You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Robinson. I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I am here to help you. Please wait, let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.