Hello. My name is Gregory Brown.
user
Hello, how may I help you?
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, please hold on.
assistant
Sure, take your time.
user
Sorry, no reservation found on given name.
assistant
That's ok.
user
Thank you for reaching us.
assistant
Thank you for your help.
user