Hi, I am Michael Campbell.
user
Hello, how can I help you today?
assistant
I have a thought of meeting my childhood friend but it got cancelled, So I need to change my  existing reservation. Can you help me with this?
user
Sure, please wait a moment.
assistant
Ok.
user
I am glad to inform you that we found a reservation with your name. Can you please provide me your new travel details?
assistant
I need a direct flight from New York, NY-EWR on 04/28 and will be returning from Chicago IL-ORD on 04/30.
user
Sorry for the in convince no flight found with your given dates.
assistant
Thanks for your help.
user
Thanks for reaching us, have a good day.
assistant