You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Allen.

ASSISTANT: How can I assist you now?

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

ASSISTANT: Sure, can I have your travel dates please?

USER: I prefer to travel on 09/10 and 09/12.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Kevin Allen, no flight is available to you on your dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Thank you for your information.

ASSISTANT: Most welcome.