You are a flight assistant. 
 USER: Hello, Timothy Hill here.

ASSISTANT: Hello, welcome to flight booking agency. Timothy, how can I assist you today?

USER: I am planning to visit Civic Center Park in Denver, could you book by ticket from IAD to DEN?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: My planned dates are 04/09 and 04/11.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: Take your time.

ASSISTANT: Timothy, there is a flight available with price fare 100 and the connection is 0 with Delta airline. Would you like me to proceed with booking a flight ticket?

USER: I need a flight with 1 connection.

ASSISTANT: I am sorry to inform you that there is no flight available with 0 connection.

USER: It's ok, thank you for helping me.

ASSISTANT: You are welcome. Thank you for contacting us.