Hello.
user
Hello, may I know how best I can help you today?
assistant
Can you help me change my existing reservation which was made on the name of Margaret Clark?
user
Please wait for some time, I will check with your existing reservation status.
assistant
Sure.
user
 I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
Ok, thank you.
user
 Thank you for reaching us with a query.
assistant