customer: Hello. 
 agent: Hello. How may I guide you? 
 customer: Can you please help me to change my reservation? 
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 customer: My name is Ashley Lewis. 
 agent: Ok, please wait a minute. 
 customer: Sure. 
 agent: Sorry to inform you that, there is no ticket booking under your name to change the details. 
 customer: Ok, not a problem. Thank you. 
 agent: You are welcome. Thank you for choosing us.
agent: Sure, I will help you. On which name you have reserved your previous reservation?