Hello.
user
Hello. How may I help you?
assistant
I want to do some changes in the existing reservation because my friends are not able to come on the those dates, can you please help me?
user
Give me a moment.
assistant
Sure.
user
Sorry, I didn't found any reservation basis on your details.
assistant
It's ok.
user
Can I know your name for further proceedings?
assistant
My name  is Joshua Perez.
user
Thank you for reaching us.
assistant
Thank you for your time.
user
Most welcome.
assistant