You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a ticket from DCA to LAS?

ASSISTANT: Sure, please share your travelling dates.

USER: My travelling dates will be on Mar 9 to Mar 11.

ASSISTANT: Do you need any connection limit?

USER: I would like to travel a connecting flight.

ASSISTANT: Can you share me your depart and arrival timings?

USER: I am comfortable to travel at any timings.

ASSISTANT: Can I know your class preference?

USER: I would prefer a normal-cost airline. Sorry, I am comfortable to travel in any class.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: May I know your name for reservation?

USER: Jason Roberts here.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: I found a connecting flight in economy class with United Airlines and ticket fare of 200. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket is reserved with flight 1007.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.