Hello.
user
Hello, do you need any help from us?
assistant
 I got an appointment to meet obligates of United states but suddenly they went to another location on the same dates, can you please help me in flight ticket modification process?
user
Sure, please tell me your name.
assistant
Sure, my name is John Hernandez.
user
Ok, please allow me a moment.
assistant
Sure.
user
 Sorry, there is no reservation with your name in our portal to make changes.
assistant
Ok, thanks for your help.
user
You are welcome, have a great day.
assistant