You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Suddenly, I fallen sick.So I want you to cancel my reservation. Can you help me?

ASSISTANT: Sure, may I know your name to proceed further?

USER: Check the reservation details on Elizabeth Campbell.

ASSISTANT: I am really sorry for to tell you, I cannot find any reservation with your name.

USER: That's ok.

ASSISTANT: Thanks for contacting us.

USER: Thank you for your information.

ASSISTANT: It's my pleasure.