a. Asking the caller's name.
b. The caller wants to leave a note.
c. The operator will tell the message when he comes back.
d. The caller wants to speak with the person she/he knows.
e. Someone is already using the phone.
f. Asking to wait until the line is free.
g. The operator offers the caller to leave a message.
h. She is talking on another phone.
i. Answering the phone.
l. You call me earlier and I'm calling you back now.