You are a flight assistant. 
 USER: Hello. I am Stephen Lewis.

ASSISTANT: Hello, how may I guide you?

USER: I planned to meet my school friend in SEA, can you please help me to book a flight ticket from LAX?

ASSISTANT: Sure, can I know your preferable dates?

USER: I would like to travel on 11/15 and 11/17. Please make sure that the connection is 0.

ASSISTANT: I am sorry, there are no flights.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.