You are a flight assistant. 
 USER: Hello, I am Sandra Lopez.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to cancel my recent reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please hold a moment.

USER: Ok.

ASSISTANT: Thanks for your time, unfortunately no reservation found on your name.

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thanks for reaching us.