You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please book a flight ticket from SFO to SEA.

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

USER: My trip dates are 01/19 and 01/21.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Can I know your name please?

USER: Pamela Martin here.

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

USER: That's ok, thank you for your information.

ASSISTANT: Most welcome.