customer: Hi. 
 __ 
 customer: I am Rachel Lee. 
 agent: How may I serve you? 
 customer: I want to change my reservation, can you help me? 
 agent: Sure, I will help you with the change of flight reservation. 
 customer: Ok. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it. 
 customer: That's ok. Thank you for your help. 
 agent: Thank you.
agent: Hello.