You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Raymond Allen here. I would like to cancel my reservation due to some health issues, can you please help me out?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, I will wait for your response.

ASSISTANT: Happy to say, I have successfully cancelled your ticket.

USER: Thank you for your service.

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