You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: Can you aid me to book my ticket from MCO to IAD?

ASSISTANT: Sure, may I know the travelling dates?

USER: My trip dates are May 25 and May 27 respectively.

ASSISTANT: Do you have any connection limits?

USER: I prefer for direct flight to travel.

ASSISTANT: Is there any other requirement?

USER: I prefer to travel in business class flight.

ASSISTANT: May I know your name?

USER: Rebecca Evans here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no flights found with your preferable dates.

USER: Thank you.

ASSISTANT: Thank you for availing us.