Hello, I am Jack Johnson.
user
Hello, how may I oblige you today?
assistant
Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.
user
Sure, please wait I will get back to you.
assistant
Ok.
user
we are sorry to inform you that there is no reservation found with your name.
assistant
Ok, no problem. Thank you for your response.
user
Thank you for contacting us.
assistant