You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I'm Michael Collins. I'm planning a trip to Land of OZ in CLT, can you book a ticket from SEA?

ASSISTANT: Sure. Please help me with your travel dates.

USER: My planning dates are from 10/18 to 10/20.

ASSISTANT: Collins, there are no flights available right now with the details you provided.

USER: It's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.