You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michael Evans here.

ASSISTANT: How may I help you?

USER: I would like to attend a business meeting in Washington, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: Sure, I want to travel from OAK to IAD.

ASSISTANT: When you are planned to start your journey?

USER: I am heading from my location on 04/03 and please book a return ticket on 04/05.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Flight-1010 of JetBlue airline is available for you. Shall I proceed?

USER: That's fine, you can proceed with booking.

ASSISTANT: Your ticket has been booked, have a nice day.

USER: Thank you for your help.

ASSISTANT: Welcome.