Hello.
user
Hello. How can I serve you?
assistant
 I am Nicholas Green want to change my reservation owing an emergency meeting. Can you please change my reservation?
user
Sure, We are here to help you.
assistant
Thank you.
user
Please wait a while.
assistant
Ok.
user
Thanks for your time. We didn't found any reservation by this name.
assistant
Ok, no issues. Thank you for your response.
user
Thank you for choosing us.
assistant