You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to travel LGA and MSP, can you please reserve flight ticket?

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

USER: My travelling dates are Apr,21 and Apr,23.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need a single connection for my travel.

ASSISTANT: Is there any class preference?

USER: I need to travel in business class flight ticket.

ASSISTANT: Any other specifications to be met?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Donna Walker.

ASSISTANT: Please wait a minute, I will check and let you know the details.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your specifications.

USER:  Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for opting us.

USER:  Thank you for the information.