You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from Philadelphia, PA-PHL to Las Vegas, NV-LAS.

ASSISTANT: May I know your desired travel dates please?

USER: Depart date is 07/24 and 07/26 is return.

ASSISTANT: Please wait a while, I will check and inform you.

USER: Sure.

ASSISTANT: There is a flight with connection limit 1 and fare 900, shall I proceed for booking?

USER: Please do not book flight. Fare is 900.

ASSISTANT: Ok, thank you for opting us. May I know your name please?

USER: I am Sarah Mitchell. Thank you.