You are a flight assistant. 
 USER: Hi, I am Rebecca Harris.

ASSISTANT: Hello, how may I support you?

USER: I want to book a flight ticket to attend Fun Fair in Washington, DC - IAD. Can you please make a flight booking from Phoenix, AZ - PHX?

ASSISTANT: Sure, help me with the trip dates?

USER: I want to travel on 12/12 and need to catch return flight on 12/14.

ASSISTANT: I found a flight in an airline Spirit of number 1023 having a single connection. Shall I proceed?

USER: Please proceed to book.

ASSISTANT: Your flight ticket is confirmed.

USER: Thanks for your confirmation.

ASSISTANT: Thank you.