You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to travel to Orlando, can you please help me to reserve a plane ticket from Washington?

ASSISTANT: Sure, I will help you. Can I have your name?

USER: Thank you. My name is Richard Smith.

ASSISTANT: May I know, from where would you prefer to take off?

USER: I would like to take off from the airport DCA.

ASSISTANT: When would you like me to book your flight ticket?

USER: I would like to travel on these dates August 12th and 14th.

ASSISTANT: Let me know your connection limit.

USER: I mostly prefer a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I am comfortable to travel in a business class flight. So, please provide me a best flight.

ASSISTANT: Please, wait for a while.

USER: Ok, take your time. I will wait for your response.

ASSISTANT: Thank you for waiting. Unfortunately, there were no flights available that matches your requirements.

USER: Oh! It is sad to hear from your end. Anyways thank you for searching.

ASSISTANT: Thank you for availing us.

USER: You are welcome.