Hello.
user
Hello, how can I assist you for the day?
assistant
 I am George Martin want to change my reservation  due to prepone of my meeting.
user
Sure, George Martin. Please give me a minute, I will check the reservation list.
assistant
Ok.
user
Thanks for your patience, we did not find any reservation based on your name.
assistant
Thank you for your help.
user
Thank you for contacting us.
assistant