You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking a flight ticket from LAX to SFO?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I want to travel on 04/28, and return on 04/30.

ASSISTANT: Do you need break in between your journey?

USER: I am comfortable with any connection.

ASSISTANT: Please let me know if you have any other specifications. May I know your good name please?

USER: No, proceed with the above details. I am Brian Allen.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: OK, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.