You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from LAX to PHL. Can you please help me in ticket booking?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 03/23 to 03/25.

ASSISTANT: Ok,do you have any other requirements?

USER: I want to book my ticket in business class and also I want a single connection.

ASSISTANT: Well, can I know your name please?

USER: Myself Raymond Thomas.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you.

ASSISTANT: My pleasure.