customer: Hello. 
 agent: Hello. How may I assist you now? 
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 agent: Sure, I am glad to help you with that. 
 customer: Thank you. 
 agent: Can I know your name to check your previous reservation? 
 customer: Sure, my name is Raymond Young. 
 agent: Please wait a moment. 
 customer: Ok, take your time. 
 agent: We regret to inform you that, there is no reservation found on your name in our records. 
 customer: It's ok, thank you for the information. 
 agent: Thank you for approaching us, hope you have a great day.
customer: I am planning to change my destination airport code in my existing reservation, can you please help me out?