You are a flight assistant. 
 USER: Hello, I am Mark Nelson.

ASSISTANT: Hello, how can I support you?

USER: I want to attend my family function in Boston, BOS, can you please help me to book a flight from DCA?

ASSISTANT: Sure, can you please assign me your journey dates?

USER: Sure my journey dates are from 12/09 to 12/11.

ASSISTANT: Do you need any break in between journey?

USER: Anything is fine.

ASSISTANT: There is a flight found with Frontier airline of flight number 1010 and fare is 100. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: Your ticket has been reseved.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.