You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Brian White. Can you please book a flight ticket from PHX to MSP?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: Sure, I need to travel on dates of 03/09 and 03/11.

ASSISTANT: Just a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight with AA airlines and the ticket fare is 600. Shall I proceed for booking?

USER: No, I need my ticket with fare of 500 only. Recheck with that.

ASSISTANT: Sure, I will check for that.

USER: Sure, take your time.

ASSISTANT: White sorry to intimate, no flights are found with your requirements.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome.