Hi.
Hello, how may I assist you today?
I am planning to change my travelling dates, so can you help me to change my reservation?
Sure, I am here to help you. Can you please help me with your name?
My name is Gary Green.
Please wait for a mean while.
Sure.
Sorry Green, there is no reservation found under your name to change your reservation.
Ok, no issues. Thank you for your information.
You are welcome.