customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: I am William Jackson. I would like to postpone my existing reservation due to postpone of my meeting, can you help me in booking a ticket? 
 agent: Sure, I am here to help you. 
 customer: Ok. 
 agent: Please stand by I will get back to you,. 
 __ 
 agent: Thank you for waiting, sorry to say no reservation found on your name. 
 customer: Ok, no worries at all. 
 agent: Thank you for reaching us, have a nice day. 
 customer: Thank you.
customer: Sure.