You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to attend music concert at IAH, can you please help me with booking a flight ticket from ORD?

ASSISTANT: Your travelling dates please?

USER: Sure, I would like to take off on Nov 17 and return on Nov 19.

ASSISTANT: Do you have any specifications?

USER: I prefer business class.

ASSISTANT: Is there any thing else?

USER: I need a flight with 1 connection.

ASSISTANT: May I know your name please?

USER: My name is Jeffrey King.

ASSISTANT: I am sorry no reservation found on your route.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.