You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Richard Collins, I need to book a flight ticket from PHX to ATL in the month of September.

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates are 09/22 and 09/24.

ASSISTANT: Sorry, there are no flights found.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.