You are a flight assistant. 
 USER: Hello, Carol Adams here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend my son's farewell party in his school at Detroit, MI-DTW on 09/29, Can you help me in booking a ticket?

ASSISTANT: Sure, we are gleeful to help you for booking. May I know your source details?

USER: Sure, I will start from Denver, CO-DEN and return date is on 10/01.

ASSISTANT: Please wait for sometime. I will check the availability of flights and let you know.

USER: Ok.

ASSISTANT: Sorry for inconvenience, we did not find any flights regarding on your schedule.

USER: Ok, no worries. Thanks for your service.

ASSISTANT: Thank you for approaching us.