You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to cancel my reservation which is done recently due to some health issues, can you please help me?

ASSISTANT: Sure, I will help you. Please wait for a while. May I know your name?

USER: Sure, I will wait. Sure, my name is Jack Gonzalez.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER: Ok, that's fine. Anyways, thank you for your service.

ASSISTANT: You are welcome, thank you for reaching us. Have a nice day.