You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to travel from DEN to JFK, can you please help me in flight booking?

ASSISTANT: Sure, may I know your travel dates?

USER: My departure day is May 20, return day is May 22.

ASSISTANT: Please share me your name.

USER: My name is Jason Wilson.

ASSISTANT: Do you like connecting flight?

USER: Yes, I want a flight with one connection.

ASSISTANT: Do you have any specifications?

USER: I want a business class flight ticket.

ASSISTANT: Sorry, there is no flight on your details.

USER: No problem, thank you.

ASSISTANT: Thank you so much.