Hello.
user
Hello, how best I can serve you at this moment?
assistant
I want to change my reservation as my joining date got postponed. Can you please help me?
user
Sure, we are here to help you.
assistant
Thank you.
user
Could you please provide your name to check your reservation status?
assistant
My name is Carol Johnson.
user
Ok, please be on hold for some time.
assistant
Sure, take your own time.
user
I have checked in reservation list to change your reservation, but could not find any reservation with your name.
assistant
No problem, thank you for your information.
user
Thank you  for choosing us.
assistant