You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from LAX to SEA, can you help me?

ASSISTANT: Sure, I here to help you out. Please provide me your trip dates.

USER: My travel dates are 10/18 and 10/20.

ASSISTANT: May I know your name?

USER: Myself Gary Martin.

ASSISTANT: Sorry Gary, there is no flight in your route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.