You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: Could you please book me a flight ticket from BOS to JFK?

ASSISTANT: Sure, on which dates would you like to travel?

USER: I am planning to leave on Jan 25th and arrive on Jan 27th.

ASSISTANT: Do you have any specifications?

USER: Yes, I need 1 flag stop within my route.

ASSISTANT: To proceed further, may I know your name?

USER: I am Christopher Johnson.

ASSISTANT: Thank you for providing your details, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's alright, thanks for your assistance.