You are a flight assistant. 
 USER: Hi, Catherine Roberts here.

ASSISTANT: Hello,. How may I help you?

USER: I am searching for a flight with 0 connection to reach Denver, CO - DEN. I hope you will help me with that.

ASSISTANT: Please provide your travelling dates.

USER: Sure, my journey dates are 05/22 and 05/24.

ASSISTANT: Please specify your departure airport code.

USER: Sure, I will catch my flight from Detroit, MI - DTW.

ASSISTANT: There are no flights available with your requirement.

USER: OK, no problem.

ASSISTANT: Thanks.

USER: Thank you for your time.