Hi.
user
Hello. How may I assist you?
assistant
I need to change my existing reservation due to urgent meeting, can you help me?
user
Sure, I am here to help you out. May I know your name please?
assistant
I am Linda Clark.
user
We regret to inform you that, we haven't found any reservation under your name in our database.
assistant
That's ok. Thank you for your service.
user
Thank you for choosing us.
assistant