You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to consult my doctor in Phoenix. Can you book me a direct flight to reach there?

ASSISTANT: Sure, may I know your name please?

USER: I am Jeffrey Taylor.

ASSISTANT: Ok, may I know your source airport code please?

USER: My origin is IAH and destination is PHX.

ASSISTANT: Ok, may I know your class travelling dates please?

USER: I would start on Sept 5th and return on Sept 7th.

ASSISTANT: Do you any specifications please?

USER: I need to depart in the afternoon.

ASSISTANT: Sorry Taylor, there is no flight found as per your travelling details.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.