You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this minute?

USER: I want to book a ticket from BOS to JFK to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am happy to help you with that. Can I know your itinerary dates?

USER: I am departing on Feb 26 and return on Feb 28.

ASSISTANT: Do you have any other requirements?

USER: I prefer a flight with connection limit 1.

ASSISTANT: Ok, may I know your name?

USER: My name is Frank Clark.

ASSISTANT: Can I know your class preference?

USER: I do not have any class preference.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.