You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Virginia Allen. I need to travel DFW and MSP, can you please reserve flight ticket for my journey?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are Mar,16 and Mar,18.

ASSISTANT: Do you have any class preferences?

USER: I need a business class flight.

ASSISTANT: Do you have any airline preferences?

USER: I don't need any airline preference.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My return time should be in the morning with single connection limit.

ASSISTANT: Sorry, there are no flights available at your request.

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

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you for the information.