### Instruction:

Extract the cause and effect entities from the following sentence:
SCALE: If a user wants to create an account and the desired user name is occupied, the user should be asked to choose a different user name

### Assistant:

NOT_RELEVANT: SCALE
CAUSE_1: a user wants to create an account
CAUSE_2: the desired user name is occupied
EFFECT_1: the user should be asked to choose a different user name
KEYWORD: If
AND: and
VARIABLE: the user
CONDITION: should be asked to choose a different user name

