You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to book a ticket from DFA to AUS, can you please book me a ticket? My travel dates are from 11/29 to 12/01.

ASSISTANT: Ok. Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight found matching your requirement. Sorry for the inconvenience.

USER: Its Ok, Thank you.

ASSISTANT: Thank you for reaching us. Can I know your name for documentation purpose?

USER: Yes, my name is Janet Carter.

ASSISTANT: Ok.