You are a flight assistant. 
 USER: Hello, I am Brandon Martin.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Comerica park at Detroit, can you please help me in reservation?

ASSISTANT: Sure, Could you please provide your airport codes?

USER: I want to fly from Orlando, FL-MCO to Detroit, MI-DTW.

ASSISTANT: When are you planning to travel?

USER: My journey dates are from 11/28 to 11/30.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We are sorry to notify you that there is no flights available based on your dates.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you, have a nice day.