You are a flight assistant. 
 USER: Hi. I am Melissa Mitchell.

ASSISTANT: Hello, how can I assist you?

USER: I want  a  flight on 12/15 to 12/17, can you please book it?

ASSISTANT: Sure, could you please provide your airport codes?

USER: My source airport code is DEN and destination code is JFK. As my budget is low, I need a flight with fare 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Delta airlines with single connection and price is 100 of 1016 flight. Shall I proceed for booking?

USER: You can book it.

ASSISTANT: Booking your ticket has been confirmed.

USER: Thank you for reserving.

ASSISTANT: Thank you, have a nice day.