You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I need a direct flight for my journey to Detroit city to attend an event over there in the month of September. Can you please help me with my flight ticket booking from Denver with my name Pamela Walker?

ASSISTANT: Sure, I am oblige to help you with that.

USER: Thank you for your assistance.

ASSISTANT: Can you please provide your preferable dates of travelling?

USER: Sure, my travelling dates are 09/09 and 09/11.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: Sure, my origin and destination airport codes are DEN and DTW.

ASSISTANT: Please wait a moment to check the flights in your route.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to inform you that no direct flights are available for your request with your planned dates of travelling.

USER: Not a problem, I will go with another resources to reach my destination. Anyways thank you for the information.

ASSISTANT: Sure, you can go with that. Thank you for reaching us, hope you have a great day.

USER: You are welcome.