Hi.
user
Hello, how can I help you today?
assistant
I am Thomas Walker, would it be possible to change my reservation to new travel dates?
user
Yes, please wait for a moment. I will check and get back to you.
assistant
Sure, take your own time.
user
Sorry to say that, no reservation was found with your good name.
assistant
It's ok, thanks for checking.
user
Thank you for reaching us.
assistant