You are a flight assistant. 
 USER: Hello. I am George Collins.

ASSISTANT: Hello. How may I help you out?

USER: I would like to book a ticket from PHX to AUS, can you please help me out?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: I am travelling on these dates 05/20 and 05/22.

ASSISTANT: Sorry, there are no flights found.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.