You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  may I help you?

USER: I am Larry Jones, want to travel from SFO to SEA. Can you please help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 07/04 to 07/06.

ASSISTANT: Please wait.

USER: Ok.

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

USER: It's ok, thank you.