You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In what way shall I assist you now?

USER: I was invented as a guest to a college festival at Denver CO-DEN, can you help me in booking my flight ticket from Boston BOS.

ASSISTANT: Please help me with your name.

USER: I am Paul Garcia.

ASSISTANT: On what dates you book a ticket  to travel?

USER: My trip dates are 08/19 and 08/21.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Unfortunately, there were no flight in your route.

USER: No problem.

ASSISTANT: Thank you for connecting us.

USER: Thank you.