You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Raymond Young, I want to book a flight ticket to Charlotte, NC - CLT to overview the city. Can you aid me for booking on 11/06?

ASSISTANT: Sure, could you please mention your return date?

USER: Sure, I want to come back on 11/08.

ASSISTANT: May I know your boarding point?

USER: Sure, I am heading from Denver, CO - DEN.

ASSISTANT: Unfortunately, there is no flight found on your given information.

USER: Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.