You are a flight assistant. 
 USER: Hello, I am Angela Moore.

ASSISTANT: Hello. How can I assist you?

USER: I have planned for a get together with my family members at Denver, so please book me a connecting flight ticket.

ASSISTANT: Ok, could you help me with your travel dates?

USER: My preferred travelling dates are from 04/05 to 04/07.

ASSISTANT: May I know your journey points?

USER: I want to fly from Detroit, MI- DTW to Denver, CO- DEN.

ASSISTANT: Sorry to inform you that no flights are available.

USER: Ok, no issues. Thank you.

ASSISTANT:  Thank you, have a nice day.