Hello.
user
Hello. How may I aid 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, I am happy to help you in modifying the  ticket details. Can you please let me know your good name to check the ticket status?
assistant
Myself Jack Gonzalez.
user
Ok, please give me a moment.
assistant
Ok.
user
I am sorry to inform you that, I have not found any active reservation on your name to modify.
assistant
It's ok. Thank you.
user
Most welcome. Thank you for reaching us. Have a nice day.
assistant