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"Thank you" is a phrase which is often translated as "gracias", and "I am very well" is a phrase which is often translated as "estoy muy bien". Learn more about the difference between "thank you" and "I am very well" below.
I am very well(   
ay
ahm
veh
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ri
wehl
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. estoy muy bien 
How are you, Don? - It's the weekend, so I am very well.¿Cómo estás, Don? - Es el fin de semana, así que estoy muy bien.