You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Please book a flight ticket from BOS to MSP.

ASSISTANT: Sure, Can you please share your trip dates?

USER: I will start on Mar, 26 and return on Mar, 28.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight.

ASSISTANT: Is there any class preference?

USER: No, thanks.

ASSISTANT: Please forward your name.

USER: My name is Charles Martinez.

ASSISTANT: Do you have any other specifications?

USER: No, thanks.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for availing us.