You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you today?

USER: My name is Stephen Hill, I want to book a flight ticket from WA-SEA to IL-ORD.

ASSISTANT: Sure, can you please provide your journey dates?

USER: And my journey dates are departure on 11/13, return on 11/15.

ASSISTANT: OK, please give me a minute I will check the status and revert you.

USER: OK sure.

ASSISTANT: Thank you for waiting, I am sorry to inform you that there was no flight found with your requirements.

USER: OK, Thank you for your service.

ASSISTANT: Thank you for availing our services, have a good day.