You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know what kind of service you are expecting from us?

USER: I want to cancel my recent reservation due to health issues.

ASSISTANT: Ok, I will help you with that. Can you please share me your name?

USER: I am Kenneth Thompson.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Thank you for your response.

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