You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michelle Anderson here.

ASSISTANT: How may I aid you?

USER: Can you help me to find a flight from JFK to OAK?

ASSISTANT: Sure, may I know travel dates please?

USER: My travelling dates are 11/13 and 11/15.

ASSISTANT: Ok, please be on hold.

USER: Sure.

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

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.