You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please book a ticket from Washington DC-DCA to Denver, CO-DEN.

ASSISTANT: May I know your travel dates?

USER: Travel dates are from 02/06 to 02/08.

ASSISTANT: Do you have any preference?

USER: Price limit 500. Connections limit 1.

ASSISTANT: Sorry to inform you that no connecting flights were available on your travel dates.

USER: Thanks.

ASSISTANT: May I know your good name for documentation?

USER: I am Anna Scott.

ASSISTANT:  Thank you for availing us.