Hello, Sandra Carter here.
user
Hello, how may I serve you today?
assistant
My manager did not approve my leaves. So, I would like to change my existing reservation. Please help me out.
user
Sure, give me sometime to check and get back to you.
assistant
Sure.
user
Thank you for waiting. Unfortunately we found no reservation matching with your name.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for choosing us.
assistant