Hello.
user
Hello, how may I help you?
assistant
I am Donna Hernandez. I would like to change my existing reservation. Could you please help?
user
Sure, can I know your preferable dates?
assistant
I booked my ticket on 07/05 and return ticket was on 07/07.
user
Sure, please wait a moment. Sorry, there is no reservation found on given name.
assistant
Ok, no problem. Thank you for the information.
user
Thank you for reaching us.
assistant