You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation, as my health is not good. Can you please help me out with it?

ASSISTANT: Sure, we are happy to help you. Can I have your good name?

USER: Thank you for the response. Previous reservation was done under the name of Anna Perez.

ASSISTANT: Sorry, we did not find any active reservation on your name in our records.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.