You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please make my reservation from DEN to IAD?

ASSISTANT: Sure, may I know your itinerary dates?

USER: Sure, my travelling dates are Sept 08 and Sept 10.

ASSISTANT: Would you lie to prefer direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: My class preference is business.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: No problem, thank you for your information.

ASSISTANT: For documentation, may I know your good name please?

USER: My name is Richard Garcia.

ASSISTANT: Thank you for approaching us.