Hello,.
user
Hello,. How can I oblige you today?
assistant
Please change my existing reservation owing to an emergency.
user
Sure, we here to aid you. Let me know your name for checking the reservation.
assistant
I am Michael Perez.
user
Please stay online, I will check the reservation list whether your name is there or not.
assistant
Sure.
user
Thanks for your valuable time,  we did not find any reservation with your name Michael Perez in our database.
assistant
Thank you.
user
Thank you for reaching us.
assistant