You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you  at this moment?

USER: Can you help me to book a flight ticket from DEN to IAD?

ASSISTANT: Sure, kindly assign your journey dates?

USER: My travelling dates are 10 and 12 of Aug.

ASSISTANT: Is there any connection limit in your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Shirley Hill.

ASSISTANT: Is there are any more specifications?

USER: No.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We found a United airlines, flight number 1003, price is 200 in economy class, with single stopover. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.