You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Clark.

ASSISTANT: How may I aid you?

USER: I want to cancel my reservation due to sudden change in my schedule trip to New York.

ASSISTANT: Sure, I will help you. Please be on hold.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation in your name.

USER: Ok, thanks for giving information.

ASSISTANT: Thank you for reaching us. Have a nice day.