You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself William Clark.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from IAD to CLT, can you help me in booking the flight ticket?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, I will start my journey on 12/22 and return will be on 12/24.

ASSISTANT: We found a Delta airline, flight number:1001 and the price is 200.

USER: Sure, please proceed booking with that flight.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.