Hello.
user
Hello, how can I provide assistance to you?
assistant
Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?
user
Sure, may I know on which name the ticket has been reserved?
assistant
Sure,  my previous reservation is on the name of Rebecca Roberts.
user
Can you please wait for a moment, I will check with your reservation.
assistant
Sure.
user
We hardly tried to find your reservation but, no reservation has been found with your name.
assistant
Ok, not an issue. Thank you for checking.
user
Thank you.
assistant