You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Will you please help me to book a flight from ATL to reach AUS?

ASSISTANT: May I know your name?

USER: My name is Nancy Carter.

ASSISTANT: Can I know your depart and return dates?

USER: My planned dates are on Feb 24th to 26th.

ASSISTANT: Do you prefer a connecting flight?

USER: Yes.

ASSISTANT: May I know your other preferences?

USER: I don't have.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.