You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Taylor.

ASSISTANT: How can I assist you?

USER: I planned to attend for a wedding in DCA, can you please help me to book a flight ticket from AUS?

ASSISTANT: Sure Taylor, can I know the travel dates please?

USER: I prefer to travel on 05/07 and 05/09.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your time.