Thanks for your query,
Your daughter is having cough
with running nose which is mostly viral in nature and takes few days to subside,
and loss of appetite is a part of illness.
Relax,give her plenty of fluids,fruit juice,glucose
water,coconut water,vegetable soup.
Do not force her to eat.
Her appetite will resume in a day or two.
She should take take rest.
and cough you can give some antiallergic in prescribed dosage.
Wishing your child good health.