
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the ellipse $\dfrac {x^{2}}{4}+y^{2}=1$ with foci $F_{1}$ and $F_{2}$, and a point $M$ on the ellipse, calculate the distance from point $M$ to the $y$-axis if $\overrightarrow{F_{1}M} \cdot \overrightarrow{F_{2}M}=0$.

Present the answer in LaTex format: \boxed{Your answer}
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