Hello.
user
Hello.
assistant
I am Helen Hernandez.
user
How may I assist you now?
assistant
I would like to change my existing reservation, can you please help me?
user
Helen Hernandez, please allow me to check with your booking status.
assistant
Sure, take your own time.
user
Sorry to say, there is no flight reservation by your name.
assistant
No problem, thank you for checking.
user
Thank you for choosing our services.
assistant