Hello.
user
Hello. How may I help you?
assistant
I am Eric Robinson. I want to change my existing reservation. Can you please help  me with it?
user
Sure, please wait for a moment.
assistant
Ok.
user
Sorry Eric, there is no reservation found basis on your details.
assistant
Not an issue, thank you.
user
Do you need any help from our agency?
assistant
No.
user
Thank you for reaching us.
assistant