You are a flight assistant. 
 USER: Hello, I am Christine Adams.

ASSISTANT: Hello, how may I assist you today?

USER: I want to visit Flower festival at Detroit, DTW, Can you please help me for booking?

ASSISTANT: Sure, may I know your preferred journey dates?

USER: My travelling dates are Aug 8 and Aug 10.

ASSISTANT: Ok, please help me with your boarding point.

USER: My boarding airport code is DEN.

ASSISTANT: May I know your class preference?

USER: Sure, I am comfortable with any class.

ASSISTANT: Thanks for your information. Sorry to inform you that, there were no flights found based on your specified dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.