You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket from BOS to LAX. Could you book a ticket?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Thomas Turner.

ASSISTANT: May I know your travel dates?

USER: Travelling dates are Dec, 1 and Dec, 3.

ASSISTANT: Do you have any connecting flight preferences?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other concern?

USER: No, thanks for asking.

ASSISTANT: May I know your name please?

USER: Already mentioned above.

ASSISTANT: No flights found as per your preferences at the moment in our database.

USER: Thank you.

ASSISTANT: Thank you for choosing us.