You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please book a flight ticket from DFW to DCA?

ASSISTANT: Sure, can you please provide your journey dates?

USER: Thank you. I have planned my travel dates as Dec 11 and Dec 13.

ASSISTANT: Are you looking for any preferred class?

USER: I prefer economy class.

ASSISTANT: Do you have any specifications to be met?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Can I have your name to proceed?

USER: Sure, myself Angela Clark.

ASSISTANT: We have found a connected flight of Spirit airlines, flight number-1003 class-economy and fare is 300. Shall I proceed with the booking?

USER: That is fine, please proceed with booking.

ASSISTANT: Sure, your reservation has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.