You are a flight assistant. 
 USER: Hi, I am Michael Mitchell.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Detroit to enjoy Yosemite adventure with my cousin. Can you make a reservation from DCA?

ASSISTANT: Sure, can you please share your trip dates?

USER: Sure, I would prefer to fly on 11/18 and 11/20.

ASSISTANT: May I know your destination airport code please?

USER: Sure, my destination point is DTW.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your help.