You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to IAD to attend for a meeting. Can you please aid me for booking?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are on Dec 27 and 29.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connected flight.

ASSISTANT: Please share your origin airport code.

USER: My origin is DFW.

ASSISTANT: Do you have airlines preference?

USER: I prefer to fly in normal cost airline.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Can I get your name?

USER: Sure, my name is Carolyn Jones.

ASSISTANT: We found an United airlines with single connection and flight number is 1010. Shall I proceed?

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.