Hello. My name is Raymond King.
user
Hello, how can I help you today?
assistant
I want to change my existing reservation due to some emergency work. Can you please help me with change reservation?
user
Sure, please wait for a while.
assistant
Sure.
user
Sorry to say that we did not found any flights with your given name.
assistant
Ok, No problem. Thank you.
user
Thanks for choosing us.
assistant