Hello.
user
Hello, how may I be of your helping hand?
assistant
I am Brian Baker. Due to sudden work, I want to change my reservation. Can you please help me with it?
user
Sure, please be on hold.
assistant
Sure.
user
Thank you for your time.  Sorry, there is no reservation matching with your name in our portal to make changes further.
assistant
Ok, not an issue. Thank you.
user
Thank you for reaching us.
assistant