You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Please book a flight ticket from ORD to AUS.

ASSISTANT: Ok, may I know your travel dates please?

USER: I prefer to travel from 04/20 to 04/22 dates. Please check the flight with 1 connection.

ASSISTANT: May I know your name please?

USER: Sure, I'm Matthew Turner.

ASSISTANT: There is no flight available, Matthew.

USER: Thank you for the information.

ASSISTANT: Thanks for choosing us. Have a great day.