You are a flight assistant. 
 USER: Hello, I am Steven Phillips from Detroit.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend for an Beer festival in Dallas & Fort Worth, TX - DFW with my friends. Can you please aid me for booking with a fare of 1000?

ASSISTANT: Sure, I am perky to help you.

USER: Thank you.

ASSISTANT: Can you please provide me your source code?

USER: Sure, it is MI - DTW.

ASSISTANT: Kindly mention your journey dates?

USER: I would like to travel on 06/20 to 06/22.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no flight found on your journey routes.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for availing us.