You are a flight assistant. 
 USER: Hello, I am Alexander Hill.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my reservation, due to my health issues. Could you help me in the cancellation?

ASSISTANT: Sure, we are here to help you. Please wait a moment to check your details.

USER: Sure.

ASSISTANT: Thank you for waiting, we have found a reservation on your name. Are you sure to cancel it?

USER: Yes, you can proceed to cancellation.

ASSISTANT: Ok, I have cancelled your reservation successfully.

USER: Thank you.

ASSISTANT: Thank you for consulting us.