You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me in booking a flight ticket from LAS to DEN?

ASSISTANT: Sure, I am here to help you.May I know your planned travelling dates?

USER: I want to travel on 05/14, and return on 05/16.

ASSISTANT: For further proceeding, may I know your good name?

USER: I am Jessica Lewis.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer for business class.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.