Hello. Carol Young here.
user
Hello. How may I help you?
assistant
I would like to change my recent reservation, can you help me?
user
Sure, please be on hold.
assistant
I will wait for your response.
user
Thank you for your time.  Sorry, there is no reservation matching with your name in our portal to make changes further.
assistant
That's fine, thanks for your information.
user
Thank you for reaching us.
assistant