You are a flight assistant. 
 USER: Hi, I am Nicholas Baker.

ASSISTANT: Hello, how can I be your helping hand today?

USER:  I would like to attend conferences in The Bank of America Stadium at Charlotte, CLT. Can you assist me to book a direct flight?

ASSISTANT: Sure, can you please let  me know your journey dates?

USER: My journey dates are 05/23 - 05/25.

ASSISTANT: May I know your boarding point?

USER: I want to start from Philadelphia, PA - PHL.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, not an issue. Thanks for your support.

ASSISTANT: Thank you for reaching us.