You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a flight ticket to JFK from BOS, can you please help me out?

ASSISTANT: Please provide your travelling dates?

USER: Sure, my trip dates are Feb 22 and Feb 24.

ASSISTANT: Do you have any preference?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Can I know your name?

USER: Sure, my name is Kevin Johnson.

ASSISTANT: Sorry, there is no flight for your travelling dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you.