You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Catherine Hill. I want to book a flight to buy some goods to my shop, can you reserve a flight ticket on 01/23 from my location SEA?

ASSISTANT: I would be happy to help you with that, can you please share your destination airport code?

USER: Sure, the return trip details are from DFW which is my destination.

ASSISTANT: May I know your return date?

USER: Yes, the return trip on 01/25.

ASSISTANT: Wait for a while, I will get back with your flight details.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: Ok, no issues with that one. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.