ajax post , but I'm unable to receive data on the server - ajax

Question

I have a form in jade , I'm posting form ajax way , there is not problem in ajax method but I'm unable to receive data on the server. Please help me solve this.Previously I have never come across this.
jade
form(accept-charset="UTF-8", action="/booking/get/trips", name="gettrips", method="post", enctype='multipart/form-data', id="gettrips")
p
label(for='from') From
select#from(name="fromCity", required="required")
each fromcity in cities
option(value="#{fromcity.cityId}") #{fromcity.cityName}
p.destination
label(for='to') To
select#to(name="toCity", required="required")
option select
p
label(for='datetimepicker') Depart
input#datetimepicker(type='text', name="departDate", value='2014-03-15')
p.mr-0
label(for='datetimepicker1')
input#chk(type='checkbox', name="returnDate", value='', checked='checked')
| Return
input#datetimepicker1(type='text', value='2014-03-15')
p
button(type="submit", value="find") look
booking.js
getTrips: function getTrips(req, res, next){
var options = {
fromCity :req.body.fromCity,
toCity : req.body.toCity,
departDate : req.body.departDate
};
console.log('date ' + req.body.departDate); // undefined
if (req.body.returndate) {
options.returnDate = req.body.returnDate;
}
console.log('got form info ' + JSON.stringify(options)); //gives null
},
js
function getTrips() {
var lookup = $('#gettrips');
lookup.submit(function (ev) {
$.ajax({
type: lookup.attr('method'),
url: lookup.attr('action'),
data: lookup.serialize(),
success: function (data) {
//ok send response
}
});
ev.preventDefault();
});
}
route
var booking = require('./booking');
module.exports = function (app) {
app.post('/booking/get/trips', booking.collectTripsInfo, booking.validateTripInfo, };