Hello.
user
Hello,. What kind of assistance are you looking for?
assistant
 I am Mark Thomas want to change my reservation due to prepone of my trip with friends. Can you help me in changing?
user
Sure, please hold on. I will get back to you with the current status.
assistant
Ok.
user
Thanks for holding on, there is no reservation found on your name.
assistant
Ok, thank you for your help.
user
Thanks for approaching us.
assistant