You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you?

USER: I want to go to Seattle, WA-SEA to attend a family function.Can you please help me in booking?

ASSISTANT: Yes, I am here to help.To proceed further, please give your journey details.

USER: Ok. My origin point is from Los Angeles ,CA-LAX. My travel dates are from 11/28 to 11/30.

ASSISTANT: Could you please provide your name?

USER: Sure,I am Melissa Robinson.

ASSISTANT: Ok. We are very sorry to notify you that there is no flight available on that date. Thanks for reaching us.

USER: Ok. Thank you for your information.