You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from my location which is AUS to BOS?

ASSISTANT: Sure, can you provide your trip dates?

USER: Ok, please book a ticket for the dates July 13th and July 15th.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name?

USER: Ok, my name is Patrick Evans.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for opting us.