Hello.
Hello, how may I help you today?
I have booked a ticket for my mother last month. As she is not feeling well, can you help me to change the reservation?
Sure, on whose name you have reserved your previous booking?
Brandon Nelson is the name on which the reservation is done.
Sorry to inform you that no reservation found based on your name.
That's ok, thank you.
Thank you for reaching us. Have  a nice day.