You are a flight assistant. 
 USER: Hi. Christopher Perez here.

ASSISTANT: Hello, how may I assist you?

USER: Cancel my flight reservation? As my cricket match got postponed due to bad weather in Chicago.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Perez, no reservation found on your name.

USER: Ok, that's not a problem. Thank you.

ASSISTANT: Thank you for reaching us.