You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have a business meeting in Houston, so I want to book a ticket from Washington, can you please help me?

ASSISTANT: Sure, when you are planning to fly?

USER: I am planning to fly in this week on 02/16.

ASSISTANT: Can you help me with your preferable airport codes?

USER: My departure airport is IAD and destination airport is IAH.

ASSISTANT: When you are planning to return?

USER: I am returning from IAH on 02/18.

ASSISTANT: May I know your name?

USER: My name is Gregory Lee.

ASSISTANT: I have found a flight-1025 of JetBlue airlines, shall I proceed?

USER: I am ok with the JetBlue airlines service, please proceed for booking.

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

USER: Thank you for your service.

ASSISTANT: You are welcome.