You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua Edwards here.

ASSISTANT: Edwards, how can I assist you?

USER: Could you book my ticket in a direct flight from DTW to DEN?

ASSISTANT: Sure, I am happy to help you. Please help me with your travel dates.

USER: My trip dates are 10/30 and 11/01.

ASSISTANT: Please wait for sometime.

USER: Sure.

ASSISTANT: Sorry Edwards, there is no direct flight available on your given travel dates.

USER: No problem, thank you.

ASSISTANT: You are welcome and have a nice day.