Hi, I am Raymond Brown.
user
Hello, how can I help you?
assistant
I have planned  celebrate my grand mother's birthday, could you please help me in booking my flight ticket?
user
Sure, may I know your travel details?
assistant
My origin is from NY-EWR to TX-DFW. My depart day is on 04/11 and return day is on 04/13.
user
OK, please wait a moment. I will check and get back to you.
assistant
OK.
user
Thanks for waiting. Unfortunately there is no flight found with your request.
assistant
Its OK, thanks for informing.
user
Thank you and have a nice day.
assistant