You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I aid you today?

USER: I am Michael Mitchell. I would like to take my children to Providence Children's Film Festival at Phoenix, PHX.

ASSISTANT: Sure, can you please let me know your source point?

USER: I intend to board from Los Angeles, CA-LAX.

ASSISTANT: May I know your planned dates please?

USER: Sure, I want to start my journey on 11/18 and end my journey on 11/20.

ASSISTANT: Unfortunately there is no flights found with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.