You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I'm Gary Moore. I'd like to book a flight ticket from SEA to ORD.

ASSISTANT: Ok, can I know your travelling dates?

USER: Sure, I'm planning to start my journey on 01/08 and fly back on 01/10.

ASSISTANT: Hold on for a second, I will get back to you.

USER: Sure, please take your time.

ASSISTANT: Sorry to inform you that there are no flights found in your requested route.

USER: Ok. Thank you for the information.

ASSISTANT: Thank you for reaching us.