You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to book a flight ticket to DEN from IAD, can you please help me out?

ASSISTANT: Sure, I can help you and may I know your planned travel dates?

USER: Sure, my planned travelling dates are Sept 15 and Sept 17.

ASSISTANT: May I know your name please?

USER: Sure, my name is Linda Hall.

ASSISTANT: May I know your connection limit?

USER: Sure, I am looking for a flight with 1 connection.

ASSISTANT: May I know your airline preference?

USER: Sure, I prefer normal-cost airline.

ASSISTANT: Please wait for a moment.

USER: Please confirm my reservation if it is business class.

ASSISTANT: Sorry, there is no flight obtained on your travel dates to book a flight ticket.

USER: It's ok, thank you for the information.

ASSISTANT: You are most welcome and thank you for reaching us.