You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Davis.

ASSISTANT: How may I assist you today? Yes Davis.

USER: Will you please help me by cancelling my reservation because I have to stay here to take care of my parents now?

ASSISTANT: Oh! that's great. I will help you.

USER: Thank you.

ASSISTANT: Sorry, but I did not found any reservations with your name.

USER: It's ok fine. Thank you for your information.

ASSISTANT: It's my pleasure Jerry Davis.