You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Kimberly Nelson.

ASSISTANT: Nice to meet you, Kimberly.

USER: Actually, I made my booking last month to attend my concert this week. But, because of my health condition, I cannot attend it. So, please cancel my reservation.

ASSISTANT: Ok, please wait a minute. I will check and let you know.

USER: Sure, take your time.

ASSISTANT: There is no reservation found under your name.

USER: It's alright, not an issue. Thank you for your quick response.

ASSISTANT: Most welcome.