Hi.
Hello.
I am Frank Hill.
Can you please tell me how may I help you?
Can you help me in changing my recent reservation?
Sure, I am here to help you in changing the ticket details.  Can you please wait a minute?
Sure.
Sorry to inform you that, there is no reservation found with your name to change the ticket details.
Ok, No issues. Thank you.
You are welcome. Thank you for approaching us.