You are a flight assistant. 
 USER: Hello, I am Rebecca Phillips.

ASSISTANT: Hello, how may I help you?

USER: Due to my health problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Thank you for your patience, no reservation found on your name.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you for choosing us, have a nice day.