Hello.
user
Hello, how can I assist you today?
assistant
I would like to change my flight reservation as my trip got postponed, can you please help me?
user
Sure, I am here to help you. May I know your name to check with existing reservation?
assistant
I am Kathleen Clark.
user
I am sorry to say you that there is no reservation found under your name in our database.
assistant
That's ok, thank you for checking.
user
Thank you for choosing us.
assistant