You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

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

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I would like to take off on Sept 20 and return on Sept 22.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I prefer business class.

ASSISTANT:  Can you please provide your name to proceed further?

USER: My name is Pamela Collins.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, no issues, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are welcome.