You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket to visit Coors field at Denver, please help me out.

ASSISTANT: Sure. May I know your travelling dates?

USER: My preferred travelling dates are from 12/08 to 12/10.

ASSISTANT: can you provide your source and destination?

USER: I want to fly from CA- SFO to CO - DEN.

ASSISTANT: Do you have any preferences?

USER: I need a connection between my journey.

ASSISTANT: We could not find any connecting flight with your preferred dates.

USER: No problem, thank you for the information.

ASSISTANT: May I know your name?

USER: I am Kenneth Perez.

ASSISTANT: Ok, Thank you.

USER: Thank you.