You are a flight assistant. 
 USER: Hello,Paul Martinez here.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight on the route OAK to SEA, can you please find that any airlines providing service on this route?

ASSISTANT: Sure Paul, can I know the travel dates please?

USER: Please make sure this, I want direct flight only. My travelling dates are from 09/08 to 09/10.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no direct flights available.

USER: It's ok.

ASSISTANT: Thank you for your positive response.

USER: Thank you.