Hello.
user
Hello.
assistant
I am David Green.
user
How can I aid you?
assistant
Due to sudden change in the climate,  so I want to change my recent reservation. Could you please help me with this?
user
Sure,wait for a minute.
assistant
Ok.
user
Thanks for waiting. Sorry, there is no reservation found on your name.
assistant
Ok, no issues. Thank you for your information.
user
Thank you for availing us.
assistant