Hello. I am Alexander Lewis.
user
Hello. How can I assist you?
assistant
I need to change my existing reservation, as my scheduled football match got postponed. Please help me in changing?
user
 Sure, please wait I will check and revert you in a moment.
assistant
Ok.
user
Sorry, no reservation was found on your name.
assistant
Ok, no worries. Thank you for your service.
user
Thank you for availing us.
assistant