You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Patrick Hall. I need to book a flight ticket from DEN to MCO, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: Thank you. I would like to travel on 10/18 to 10/20.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.