customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: Larry Campbell here. I need to cancel my recent reservation because my trip dates are postponed, can you help me? 
 agent: Sure, please wait for a moment. 
 customer: Ok, take your own time. 
 agent: Sorry, there is no reservation found on your name in our database to cancel. 
 __ 
 agent: You are welcome.
customer: That's ok, thank you for checking.