You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from LAX to BOS, Can you please help me for booking?

ASSISTANT: Sure, May I know you travelling dates?

USER: I would like to travel on 11/24 to return on 11/26.

ASSISTANT: Do you have any class preference?

USER: I need a business class.

ASSISTANT: Is there any other preferences?

USER: Yes, I need a connecting flihgt.

ASSISTANT: May I know your name?

USER: Paul Mitchell.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you.