You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Wilson.

ASSISTANT: Wilson, how can I help you today?

USER: I am planning to visit a new place in Washington. Can you please help me out to book a ticket?

ASSISTANT: Sure, I will help you in booking, may I know your airport codes?

USER: My nearest source airport is CLT and my destination airport code is DCA.

ASSISTANT: Can you please share your travelling dates?

USER: I would like to travel on 08/30 and return on 09/01.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: There is a flight in Delta airline with connection 1 price 100 as per your details, can I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket is confirmed by flight number 1009.

USER: Thank you for your help.

ASSISTANT: My pleasure, have a nice trip.