You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to book my ticket from SEA to LAX. Can you please help me with booking a flight ticket?

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

USER: My planned trip dates are from Aug 15 to Aug 17.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a connecting flight in my journey.

ASSISTANT: Can I know your name please?

USER: Sure, myself Kevin Harris.

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

USER: That's ok, no problem.

ASSISTANT: Most welcome.

USER: Thank you for your service.