You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Barbara King, I am visit Guthrie theater at Minneapolis, can you help to book a flight ticket with one connection?

ASSISTANT: Sure, May I know the travel codes?

USER: I will return on 06/08 and plan to travel on 06/06.

ASSISTANT: Please help me with your journey codes.

USER: My destination is airport is MN-MSP and source is Detriot MI-DTW. My budget for flight ticket is 500.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.