You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Donald Clark.

ASSISTANT: Hello Donald.

USER: Due to some issues, I want to cancel my recent reservation.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation showing on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.