You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Rebecca Miller here. I want to cancel my reservation as my doctor suggested me not to travel. Can you help me?

ASSISTANT: Sure, please allow me a moment.

USER: Ok, please check my previous booking status. I will be waiting for your response.

ASSISTANT: Ok, take your time.

USER: No issues. Oh! That's very sad to know, I am very upset with this news.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: Most welcome.