You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you today?

USER: I am Brain Martinez, I am going to Charlotte from Denver to visit a theme park Carowinds.

ASSISTANT: Ok.

USER: Can you help me to find a flight on 12/18?

ASSISTANT: Sure. May I know when are you intend to return?

USER: Sure, on 12/20.

ASSISTANT: Please provide your travel codes also.

USER: I will travel from Denver airport CO-DEN to airport of Charlotte NC-CLT. I need a direct flight to Charlotte.

ASSISTANT: Your request is taken into consideration, but we could not provide you direct flight. There is only connecting flight.

USER: Ok, thanks for the information.

ASSISTANT: Thank You, for reaching us.