You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I reserved a plane ticket to my destination in advance and my brother also reserved me a plane ticket. Can you please cancel my reservation with the name of Betty Lewis?

ASSISTANT: Sure. Please give me a minute.

USER: Ok.

ASSISTANT: There is no reservation found under your name.

USER: It's ok. Thank you for the information.

ASSISTANT: Most welcome.