Hello.
user
Hello, how may I help you?
assistant
Can you please change my existing reservation  as my plan to go for holiday trip got postponed?
user
Sure, can you please help me with your name?
assistant
I am Lisa Lopez.
user
Please wait for a while.
assistant
Sure.
user
Sorry, there is no reservation found on your name.
assistant
Ok, not an issue. Thank you for the information.
user
Thank you for opting us.
assistant