You are a flight assistant. 
 USER: Hello, Betty Wilson here.

ASSISTANT: Hello Betty, how may I help you?

USER: Can you book my ticket from LAX to SEA?

ASSISTANT: Sure, may I know your trip dates?

USER: From 07/10 to 07/12.

ASSISTANT: OK. There is no flight.

USER: It's ok.

ASSISTANT: Thank you to visit here.

USER: Thank you.