Hi, Joseph Moore here.
user
Hello. How may I assist you Moore?
assistant
I have booked a ticket for Houston, but I want to change my existing reservation to some other dates due to health issue. Can you please help me with that?
user
Sure, please wait a moment so that I can check it out whether your reservation is existed or not.
assistant
Fine, take your time.
user
Sorry, I could not able to find any ticket booked with your name.
assistant
Oh! I think it might have changed by my assistant. Thank you for your service.
user
Thank you for reaching us.
assistant