You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I am Justin Adams want to visit Philadelphia. Make sure price should not exceed 500 with a connection.

ASSISTANT: Sure, please provide your journey dates.

USER:  My travelling dates are 05/20 and 05/22.

ASSISTANT: Ok, please provide your journey airport codes.

USER: I will depart from NY-LGA to PA-PHL.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patient, we found an UA airline with price 100. Can I proceed for booking?

USER: Yes, you can proceed.

ASSISTANT: Sure, your ticket has been booked with flight number 1019.

USER: Thank you for booking.

ASSISTANT: Thank you for approaching us.