You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Jones.

ASSISTANT: How can I help you Donald?

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

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: No reservation is available under your name.

USER: That's ok, thank you.

ASSISTANT: You are welcome.