You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Stephen Mitchell. I am planning to book a ticket to meet my family at JFK. Can you please help me out to book a ticket from SEA?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates to proceed further?

USER: I would like to travel on 05/20 and return back on 05/22.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available in this route.

USER: That's fine. Thank you for your service.

ASSISTANT: Welcome and thank you for reaching us.