You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please book a flight from PHX to HOU?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my travelling dates are Sept 28 - Sept 30.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Which class do you prefer for your journey?

USER: I prefer an business class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Susan Smith.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.