You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT:  Sure, may I know your good name please?

USER: Sure, my name is Alexander Lopez.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for availing us.