You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Martin.

ASSISTANT: How may I help you at this moment?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: Sure, I will help you to cancel your reservation, please wait for a minute.

USER: Thank you. Sure, I will wait.

ASSISTANT: I found a reservation with your name, can I cancel It?

USER: Please do it.

ASSISTANT: Your ticket has been cancelled successfully.

USER: Thank you for your service.

ASSISTANT: It's my pleasure.