You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am John Miller.

ASSISTANT: Nice to meet you John.

USER: Can you help me in booking from JFK to BOS, as there is a business meeting to attend at Boston?

ASSISTANT: Sure, I need to know your preferable dates for booking a flight ticket?

USER: My trip dates are 06/22 to 06/24.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry John, no flights are available on your desired route.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for opting us.