Hi.
user
Hello. How may I help you?
assistant
I want to change an existing reservation due to sudden change in my trip . Can you help me?
user
I am here to help you, please provide your name to check your reservation.
assistant
Thank you. Richard Campbell.
user
Sorry, there is no reservation found on your name to change it.
assistant
No issue. Thank you.
user
Thanks for reaching us.
assistant