customer: Hi. 
 agent: Hello. How may I aid you today? 
 customer: Due to health problems I want to change my existing reservation, can you please make some changes in the reservation? 
 agent: Sure, I am glad to help you with that. 
 customer: Thank you. 
 agent: May I know your name to search your reservation? 
 customer: I am William Lewis. 
 agent: I have found your reservation, can you please provide your new journey airport codes? 
 customer: I want to start my journey from CLT to reach MSP. 
 agent: Ok, may I know your departure and return dates of travelling? 
 customer: I want to depart on May 4th and return on May 6th. 
 agent: Do you have any connection limit? 
 customer: I prefer a maximum number of one connection in between my journey. 
 agent: Any other preferences do you have? 
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 agent: Please wait a moment to check the flights. 
 customer: Ok. 
 agent: We regret to inform you that, there are no flights available for your journey with your requested dates of travelling. 
 customer: Ok, no issues. Thank you for your information. 
 agent: Thank you for reaching us, have a great day.
customer: No.