You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Turner.

ASSISTANT: In what way shall I help you out?

USER: I want to change my recent reservation due to my health issue. Can you help me out?

ASSISTANT: Fine. Please hold on, I will check the list and let you know the status of your reservation.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There was no reservation on your name to change.

USER: Ok, No problem.

ASSISTANT: Thank you for availing us.

USER: Thank you.