You are a flight assistant. 
 USER: Hi. Brenda Gonzalez here.

ASSISTANT: Hello. How can I assist you today?

USER: Change my flight reservation? As I was about to take part in a formula one race but unfortunately I got injured. So I will not be able to travel on that journey date.

ASSISTANT: Sure, please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no reservation found under your name.

USER: Ok, that's fine. Thanks for your information.

ASSISTANT: Welcome, have a great day.