You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from DFW to BOS. Can you please help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 02/08 to 02/10.

ASSISTANT: Do you have any other requirements?

USER: My class preference is business class with 1 connection.

ASSISTANT: Can I know your name please?

USER: Myself Anna Martinez.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you.