You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Mark Hill. Can you please help me to book a flight ticket from DCA to ATL?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: My travel dates are Jan 11 to Jan 13.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Flight-1026 is available with UA airlines and the ticket fare is 500 only. Is that ok for you?

USER: Ok, please proceed to book.

ASSISTANT: Mark Hill, your ticket is booked successfully.

USER: Thanks for your service.

ASSISTANT: You are welcome and thank you for reaching us.