Hi.
user
Hello, how can I assist you for the day?
assistant
 I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?
user
Let me know your name to check your reservation?
assistant
David Miller here.
user
I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
No problem, thanks for the information.
user
Thank you for reaching us.
assistant