customer: Hi. 
 agent: Hello. 
 customer: I am Shirley Rodriguez. 
 agent: How may I guide you today? 
 customer: I would like to change my existing reservation, because while booking I gave wrong airport codes in my previous reservation, so can you help me for this? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: Please wait for a moment. 
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 agent: I am sorry to say that there is no reservation found on your name. 
 customer: Oh! It is ok, no problem. Thank you for your quick response. 
 agent: Thank you for reaching us, have a great day.
customer: Ok, I will wait for your reply.