You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Edwards.

ASSISTANT: I am here to assist you with your concerns?

USER: I am planning for a vacation from AUS to BOS, to visit home. Can you help me?

ASSISTANT: Yes, I will help. May I know your travel dates.

USER: Sure, my trip dates are 09/18 and 09/20.

ASSISTANT: Sorry, there are no flight available on that date.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for choosing our agency.