Hi, Gary Thompson here.
user
Hello, how can I assist you today?
assistant
Due to some health issues, I want to change my existing reservation. Can you please help me with this?
user
Sure, we are here to help you for that. Please hold on.
assistant
Sure.
user
Thanks for being hold, we did not find any  reservation on your name.
assistant
Ok, not an issue. Thanks for your assistance.
user
Thank you for choosing us. Have a nice day.
assistant