You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Jeffrey Williams, want to travel from SEA to ORD. Please help me.

ASSISTANT: Sure, I will help you out in booking the ticket. May I know your travelling dates please?

USER: My trip dates are from 08/12 to 08/14.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.