Hi.
user
Hello.
assistant
I am Michael  Lopez.
user
What can I do for you?
assistant
As my plan for business trip was preponed , I need to change my existing reservation.
user
Ok. Please wait for a minute, I will let you know the details.
assistant
Sure.
user
Thanks for your time. We found that there was no reservation with your name.
assistant
Thank you for your information.
user
Thanks for reaching us.
assistant