Hello.
Hello. How may I aid you today?
Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.
Sure, I will help you with that.
Thank you.
May I know your name please to proceed further?
My name is Sarah Taylor.
I am sorry to inform that  there is no reservation found under your name.
It's ok, thank you for your help.
Thank you for contacting us.