You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to meet my twin sister to celebrate our birthday, could you book my ticket from AUS to PHX?

ASSISTANT: Sure, please share your journey dates?

USER: My itinerary dates are May 10 and May 12.

ASSISTANT: Do you have any specifications?

USER: I want to return from Phoenix in the morning.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: May I know your good name?

USER: Rebecca Thompson here.

ASSISTANT: Sorry, no flights found on your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.