You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Sandra Lewis. Owing to an emergency, I want to cancel my reservation.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: Not an issue. Thank you for your kind service.

ASSISTANT: Thank you for reaching us.