You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gary Hill.

ASSISTANT: What can I do for you today?

USER: I am going to write my GRE exam at Seattle, so I want to book a direct flight. Can you help me out?

ASSISTANT: Sure, please share your travelling dates?

USER: I have to go on 04/16 and I will return back on 04/18.

ASSISTANT: Ok, mention your source airport code?

USER: I want to start my journey from JFK.

ASSISTANT: Provide your destination airport code?

USER: My destination is SEA.

ASSISTANT: Ok, please give me couple of minutes.

USER: Ok.

ASSISTANT: We found a direct Delta airline with fare of 100 matches your schedule. Shall I proceed with booking?

USER: Perfect, please book it.

ASSISTANT: Your ticket has been confirmed with flight number 1018.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.