customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I want to change my existing reservation, my music concert got postponed. Can you please help me out with that? 
 agent: Sure, let me know your name to check your reservation details. 
 customer: Thank you for accepting my request, I have done my reservation on the name of Gregory Williams. 
 agent: Thank you. Please wait for a while, let me check your reservation status. 
 customer: Sure, take your time. 
 agent: I am sorry to say you that there is no reservation found under your name in our database. 
 customer: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for checking. 
 __ 
 customer: Welcome.
agent: Thank you for reaching us.