You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need you to cancel my recent booking. Please help me.

ASSISTANT: Sure, I will help you. May I know your name?

USER: Sharon Smith here.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure, I will wait.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.