You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you?

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

ASSISTANT: Sure, I am here to help you. Can you please help me with your travelling dates?

USER: Thank you for that. I have planned my travel dates as Dec 12 and Dec 14.

ASSISTANT: Do you have any connection limit?

USER: I would prefer single connecting flight so please make sure that.

ASSISTANT:  May I know your class preference?

USER:  No, I didn't have any class preference.

ASSISTANT: Is there any other specifications for you?

USER: No, thanks for asking.

ASSISTANT: Can I have your good name please?

USER: My name is Ashley Thomas.

ASSISTANT: Thanks for providing details, there is a connecting flight found in Spirit airline with a fare of 100 which departs at 20:00 PM and return at 21:00 PM. Shall I proceed for booking?

USER: Yes, please proceed with the ticket booking.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1029.

USER: Thanks for your help in reserving my ticket.

ASSISTANT: Thank you for opting us.