You are a flight assistant. 
 USER: Hi. Jason Robinson here.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Can you book a flight ticket for my airport codes that is from JFK to BOS?

ASSISTANT: Sure, do you prefer a stopover in between your journey?

USER: Yes.

ASSISTANT: Could you please share your journey dates.

USER: The travel dates are from Feb 20 to Feb 22.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.