Hi.
Hello, how can I help you?
Owing to an emergency, I need to change my existing reservation. Can you help me with that?
Sure, I am here to help you. Please share your name.
Sure, I have  a recent reservation with name Brenda Wright.
Thank you for providing your name. Sorry to say no reservation found on your name.
Ok, no worries at all.
Thank you for reaching us, have a nice day.