You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am planning to meet my friend in Denver. Could you please help me with booking a flight ticket from DTW to DEN?

ASSISTANT: Sure, may I know your name for reservation?

USER: Sure, myself John Scott.

ASSISTANT: May I know your travelling dates?

USER: My planned travel dates are from Sept 08 to Sept 10.

ASSISTANT: May I know your other specifications?

USER: I prefer to travel in direct flight. My return time should be in the morning time.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thank you for reaching our service.

USER: Thank you for your service.