Hi.
user
Hello.
assistant
Myself David Lewis.
user
Lewis, how can I guide you today?
assistant
I would like to change my existing flight reservation that has been booked earlier this week. Could you please help me in re-modifying my dates in the reservation?
user
Sure, I will help you. Please wait for a while.
assistant
Sure.
user
Sorry Lewis, I did not find any reservation under your name in our database.
assistant
It's ok, anyway thank you for the information.
user
It's my pleasure, have a nice day.
assistant