You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to meet my uncle at Seattle, please book my flight ticket from PHX to SEA.

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Thank you. I want to depart on Sept 9th and return back on Sept 11th.

ASSISTANT: May I know your name to proceed further?

USER: I am Susan Smith.

ASSISTANT: Sorry Susan Smith, there is no flight in your route as per your request.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.