You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what sort of help are you seeking from us?

USER: Can you please help me in booking my flight ticket from BOS to LAX?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: On what dates, you have planned to travel?

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: Ok, help me with your name.

USER: Myself Michael Jackson.

ASSISTANT: How many connections you prefer in your journey?

USER: I am looking for single connecting flight.

ASSISTANT: Is there any other concerns?

USER: Yes, I am searching for business class flight.

ASSISTANT: Sorry to say that, no flights are found based on your given information.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.