You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Angela Lewis here.

ASSISTANT: Nice to meet you Lewis.

USER: Due to health problem, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, hold on for a moment please.

USER: Ok.

ASSISTANT: Sorry to say this Lewis, we don't have a reservation named with Angela Lewis in our dates base.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us. Have a good day.