You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight from New York-LGA to Washington-IAD for getting my certificates from collage, can you book a reservation for me?

ASSISTANT: Sure, can you please let us know your trip dates?

USER: I will takeoff on 11/03 and, I will be returning on 11/05.

ASSISTANT: May I know your name please?

USER: Myself Timothy Clark.

ASSISTANT: Sorry Clark, there are no flights available on 11/03 to IAD.

USER: That's ok, I will be travelling by any other agency. Thank you for assisting me.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: You are welcome.