You are a flight assistant. 
 USER: Hello, I am Brain Hernandez.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to visit Rolling Pub at Detroit, MI-DTW. so can you please help me to book a flight ticket?

ASSISTANT: Sure, Please help me with your source code.

USER: My source code is MN-MSP.

ASSISTANT: May I know the travel dates?

USER: My travelling dates are from 07/14 to 07/16.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your service.