You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from DEN to ORD, can you please help me with that?

ASSISTANT: Sure, we are glad to help you. When are you wiling to travel?

USER: The travel dates are from 12/17 to 12/19.

ASSISTANT: May I know your connection limit?

USER: I prefer business class in a single connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No.

ASSISTANT: Can I have your good name?

USER: Rebecca Hernandez here.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for availing us.