Cannot access SOAP xml nested id= attribute using Savon 2 - ruby

Question

In the soap response below (from SoapUI), under the parent SearchForReservationResponse tag, I am trying to pull out the values of Reservation id, Restaurant id and Location id with Savon 2.
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<SearchForReservationResponse xmlns="http://schemas.livebookings.net/OneFormat/Aggregator/Internal/1/0/">
<Reservation id="34639536" status="Confirmed">
<DiningDateAndTime>2015-07-01T17:00:00</DiningDateAndTime>
<Restaurant id="25200">
<Name>Eat Food - UK Demo Website - Bookatable.com</Name>
<Location id="35839">
<Name>Bar</Name>
</Location>
</Restaurant>
<Size>2</Size>
<Created>2015-07-01T13:22:17.41</Created>
<SessionId>DINNER</SessionId>
<FirstName>John</FirstName>
<LastName>Smith</LastName>
<ConfirmationNumber>JWRW5HR5</ConfirmationNumber>
<AllowedToCancelOnline>true</AllowedToCancelOnline>
<RestaurantPhoneNumber type="Main">[phone]</RestaurantPhoneNumber>
</Reservation>
</SearchForReservationResponse>
</soap:Body>
</soap:Envelope>
Below is my attempt for trying to access Reservation id. After a lot of googling I found that the new Savon 2 syntax uses #attrib, but I keep getting errors as I think I am not using this Ruby nested hash syntax correctly - I find it very confusing and am fairly new to Ruby. If you could help me out here it would be much appreciated!
require 'savon'
class SearchReservation
attr_reader :reservation_id
def client
client = Savon.client(wsdl: "http://example-wsdl-url", follow_redirects: :follow_redirects)
end
def main_method(confirm_number, email)
message = {'ConfirmationNumber' => "JWRW5HR5", 'EMail' => "jon#" }
response = client.call(:search_for_reservation, message: message)
data = response.body(:search_for_reservation_response => { #attrib => {:reservation => :id} })
if data
#reservation_id = data[:id]
end
end
end
search = SearchReservation.new
puts search.main_method("JWRW5HR5", "jon#")
N.B. the email value jon# doesn't have to be a valid email address (used just for testing purposes) - it returns a valid response in SoapUI.
My last syntax error trace in the terminal/console:
/~/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/savon-2.11.1/lib/savon/response.rb:36:in `body': wrong number of arguments (1 for 0) (ArgumentError)
from search.rb:13:in `main_method'
from search.rb:22:in `<main>'

Answer 1

My final solution pulling out all the values I need. Of note: even though dining_date_and_time was presented as xml when putting response.body, when it is extracted using #dining_date_and_time = data[:dining_date_and_time] the date and time values get printed cleanly. This is key once porting to a fully-fledged Rails app.
Despite all the discussion online about attributes, ids within an xml tag can be pulled by just ensuring you are far enough down the "tree" (ie. location id falls under location tag) and then specifying the key: in this case the api displays it as :#id for each nested case.
N.B, this only returns the last value called each time in console. But all values should be pulled in views once integrated into Rails. (Hopefully!)
require 'savon'
class SearchClass
def client
client = Savon.client(wsdl: "http://wsdl-example-url", follow_redirects: :follow_redirects)
end
def return_data(confirm_number, email)
message = {'ConfirmationNumber' => confirm_number, 'EMail' => email }
response = client.call(:search_for_reservation, message: message)
data = response.to_hash[:search_for_reservation_response][:reservation]
#reservation_id = data[:#id]
#dining_date_and_time = data[:dining_date_and_time]
#size = data[:size]
#session_id = data[:session_id]
#first_name = data[:first_name]
#last_name = data[:last_name]
#confirm_number = data[:confirmation_number]
#allowed_to_cancel_online = data[:allowed_to_cancel_online]
#restaurant_phone_number = data[:restaurant_phone_number]
data2 = response.to_hash[:search_for_reservation_response][:reservation][:restaurant]
#restaurant_id = data2[:#id]
#restaurant_name = data2[:name]
data3 = response.to_hash[:search_for_reservation_response][:reservation][:restaurant][:location]
#location_id = data3[:#id]
#location_name = data3[:name]
end
end
search = SearchClass.new
puts search.return_data("JWRW5HR5", "jon#")