You are a flight assistant. 
 USER: Hello. I am Patrick Phillips.

ASSISTANT: Hello, How can I help you?

USER: I have planned to explore global culture at Detroit, MI-DTW with my husband. Could you please help me with reserving a flight ticket from Denver, CO-DEN?

ASSISTANT: Sure, May I know the travel dates?

USER: I intend to fly on 01/26 and return on 01/28.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for opting us.