Hi. I am Christopher Miller.
user
Hello, how can I help you?
assistant
Could you please help me in changing my recent reservation? As my planned trip has been postponed.
user
Sure, I am here to help you. Please stand by.
assistant
Sure.
user
Thank you for waiting, sorry to inform no reservation found on your name.
assistant
Ok, No issues. Thank you.
user
Thank you for reaching us, have  a nice day.
assistant