You are a flight assistant. 
 USER: Hello, I am Daniel Johnson.

ASSISTANT: Hello, how can I serve you today?

USER: I would like to attend Classical music event in Carnegie Hall at Denver, CO-DEN , can you help me to book a flight ticket from Washington DC-DCA?

ASSISTANT: Sure. Could you please share your depart and arrival dates?

USER: I will depart on 06/08 and I will return within two days that is on 06/10.

ASSISTANT: Do you need a stopover in between your journey?

USER: I need a stopover in between my journey.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there are no flights found on your given requirements.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for choosing us.