
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 polar equation of curve $C$ is $\rho=2\sin \theta$, and the parametric equation of line $l$ is $\begin{cases}x=- \dfrac{3}{5}t+2 \\ y= \dfrac{4}{5}t\end{cases}$ (where $t$ is the parameter),  
(Ⅰ) Convert the polar equation of curve $C$ into a Cartesian coordinate equation;  
(Ⅱ) Let the intersection of line $l$ and the $x$-axis be point $M$, and $N$ be a moving point on curve $C$, find the maximum value of $MN$.

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