You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Philadelphia, can you please book me a ticket from BOS to PHL?

ASSISTANT: Sure, I will help you in booking a flight ticket. May I know your name to proceed further?

USER: My name is Lisa Johnson.

ASSISTANT: May I know the dates that you want to travel?

USER: My preferable journey dates are July 19 and July 21.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer connecting flight on this route.

ASSISTANT: Lisa Johnson, regret to inform that there is no flight available for the given dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.