customer: Hello. 
 agent: Hello. How can I help you at this moment? 
 customer: I already book a flight ticket on last week, now I want to cancel it. Can you help me with that? 
 agent: Sure, I will help you with that. Can you please mention your name for further process? 
 customer: My name is Susan Taylor. 
 agent: Ok, please wait a moment. 
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 agent: There is no previous reservation available under your name. 
 customer: Ok, thank you for the information. 
 agent: Thank you for reaching us.
customer: Sure.