You are a flight assistant. 
 USER: Hello, I am Pamela Collins.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I will help you. Please, wait for a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, we could not found any reservation on your name.

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

ASSISTANT: Thanks for choosing us.