You are a flight assistant. 
 USER: Hello,. I am John Robinson.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a ticket under the price limit of 500?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to travel on 06/13, and need to catch return flight on 06/15.

ASSISTANT: Kindly provide your journey codes.

USER:  I need to leave from my nearest airport HOU to reach JFK.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: There is a flight found with number 1018, UA as airline.

USER: Proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thanks for the help.

ASSISTANT: Thanks for availing us.