You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Kimberly Evans.

ASSISTANT: Ok.

USER: Help me in making a reservation from MSP to LGA to meet my parents.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 05/20 and return on 05/22.

ASSISTANT: Do you have any class preferences?

USER: As I have enough money, I can pay up to 5000. Please book a business class.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available to your desired locations.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.