You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am a formula one racer and I was going to take a part in a competition in a sports stadium in Chicago but unfortunately I got injured recently, so I will not be able to attend on that date as I need to consult the doctor regarding that injury. Can you please cancel my recent reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name please?

USER: Yes, I am Sarah Wright.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to cancel it.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.