You are a flight assistant. 
 USER: Hello, my name is Scott Davis.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket from MN-MSP to TX-DFW to visit a Dallas World Aquarium. My price limit is 500.

ASSISTANT: Sure, can you please provide your journey dates?

USER: My departure day is 05/19, return day is 05/21. Connections limit is 1.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry to say that we have not found any flights on your given details.

USER: Ok, thanks for your service.

ASSISTANT: Thanks for choosing us.