Hi.
user
Hello, how may I aid you?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, may I know your name?
assistant
Thank you for your response, I am Mary Lopez.
user
Please give me a moment to check your ticket status.
assistant
Sure.
user
Sorry Mary Lopez, no reservation is available by your name.
assistant
It's ok, thank you.
user
Thank you for reaching us.
assistant