You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from ATL to MSP? As I need to attend a wedding.

ASSISTANT: Sure, I am here to help you for this. Can you please share me your travel dates?

USER: Sure, my planned departure and return travel dates are 16th and 18th of October.

ASSISTANT: Is there any other specifications regarding your journey?

USER: Yes, I prefer business class ticket and I need single connected flight.

ASSISTANT: Do you have any preference?

USER: No, I don't have.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: That's ok, thank you.

ASSISTANT: Thank you very much for contacting our agency.