You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I serve you?

USER: I am planning to go for a round trip to San Francisco, SFO under a fare of 500. Can you serve me in booking a flight ticket?

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: Please provide your planned dates?

USER: My planned dates are 02/27 and 02/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight from Spirit airline of fare of 100 and flight number 1016. Shall I confirm?

USER: Yes, please confirm.

ASSISTANT: To confirm your flight booking, may I know your name please?

USER: Ok, Joseph Phillips.

ASSISTANT: Your flight booking is done.

USER: Thanks a lot for the great help.

ASSISTANT: Thanks for contacting us.