You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from CLT to DEN. Could you book a ticket?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: Departure is June, 30 and return by July, 2.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I would prefer connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer business class.

ASSISTANT: May I know your good  name?

USER: My name is Donna Martinez.

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

USER: Thanks.

ASSISTANT: Thank you for choosing us.