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 help you. May I know your name to check with existing reservation?
assistant
I am Melissa Rodriguez.
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 opting us.
assistant