Hi, I am Margaret Davis.
user
Hello, how can I serve you?
assistant
As my plan to visit  my grandmother's home got postponed, so I want to change my reservation. Can you help me with it please?
user
Sure, we are here to help you. Please wait a moment, I will check your details and revert to you.
assistant
Ok.
user
Sorry to say that there is no reservation found on our name in our reservation list.
assistant
  That's ok. Thank you for the response.
user
Thank you for reaching us.
assistant