You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Alexander Roberts here, I would like to go my sister's home in AUS, so can you find a flight from PHX?

ASSISTANT: Sure, may I know your preferable dates?

USER: My trip dates are 04/25 and 04/27.

ASSISTANT: Ok, please wait a moment.

USER: I want a direct flight.

ASSISTANT: Sorry Roberts, there is no flight found with your requirement.

USER: That's ok, no problem.

ASSISTANT: Do you have any other planning dates?

USER: No. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.