You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you help me to book a flight ticket from SFO to PHX?

ASSISTANT: Sure, when are you willing to travel?

USER: My travel dates are Sept 20 and Sept 22.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: May I know your class requirement?

USER: I am comfortable with any class.

ASSISTANT: Do you have any planned travel timings?

USER: I am comfortable with any timings.

ASSISTANT: Would you like any lay by in between your journey?

USER: Yes, I prefer connecting flight on this route.

ASSISTANT: Ok, can you share your name to proceed further?

USER: I am Nancy Mitchell.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: United Airlines has a connecting flight with number 1019 for fare 700, shall I proceed?

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Your ticket is reserved in business class.

USER: Thank you.

ASSISTANT: Thank you for opting us.