You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Parker.

ASSISTANT: How can I help you today? Yes Parker.

USER: I want to cancel my reservation, can you help in cancelling?

ASSISTANT: Sure, I will help you. Parker, I did not find any reservation with your name in my database.

USER: That's ok, thank you for your help.

ASSISTANT: It's my pleasure, have a nice day.