Hello.
user
Hello, how can I help 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 serve you. May I know your name?
assistant
Amy Scott here.
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 giving information.
user
Thank you for choosing us.
assistant