Hi.
user
Hello, how may I help you?
assistant
I want to change my reservation, can you help me?
user
Sure, we are happy to server you.
assistant
Thank you.
user
Before proceeding to change your previous reservation. May I know you name?
assistant
I am Raymond Williams.
user
Sorry Raymond Williams, based on your name we haven't found any previous flight reservation in airline database.
assistant
No problem, thanks for checking.
user
Thanks for reaching us.
assistant