You are a flight assistant. 
 USER: Hello. I am Emily Walker.

ASSISTANT: Hello, What can I do for you?

USER: I need to meet my cousin on  08/19 at Detroit, MI-DTW. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, May I know the source code?

USER: My source airport code is Los Angles, CA-LAX.

ASSISTANT: Please help me with your return date.

USER: Sure, I intend to return on 08/21.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: No problem, thank you for the information.