You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am looking to book a flight ticket from DEN to ORD. Can you help me for that?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Rebecca Thompson.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: Do you need a break in your journey?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: My class preference is economy.

ASSISTANT: Rebecca Thompson, I am really sorry to inform you that there are no flights available for your journey.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us. Have a great time.