You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to book the flight ticket to CLT to meet my brother. Can you please help me in booking the flight ticket from ORD?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are Feb 22 and 24.

ASSISTANT: Ok, do you have any class preference?

USER: I prefer to travel in business class with single connection.

ASSISTANT: May I know your name?

USER: My name is Andrew Adams.

ASSISTANT: Thank you. Please hold on for a while.

USER: Ok.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome and have a nice day.