You are a flight assistant. 
 USER: Hello, Gary Edwards here.

ASSISTANT: Hello, how can I aid you today?

USER: I want to travel from ORD to SEA for my project meeting, could you please help me to book my flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Jan 8th is my departure date and I will be catching my return flight on Jan 10th.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure.

ASSISTANT: Sorry Gary, there are no flights available on your requested dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.