JavaScript, 484484 347 bytes
This is horrible and could most likely be golfed more. Just seeing if I could answer in JavaScript with the restrictions.
z=(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!{}+[]+!+[]]+(!![]+[])[+[]]+(!![]+[]{})[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]-~[]]
y=(!![]+[])[+!+[]]
x=([][[]]+[])[!+[]+!+[]]
v=this
c=n=>v[`St${y}ing`][`f${y}${z}mCha${y}C${z}${x}e`](n*9)
u=c(12)
t=c(13.3)
v[s=`a${u}e${y}t`](`He${u+u+z}... eh, ${t}h${z}m sh${z}u${u+x} I g${y}eet?`)
v[s](v[`p${y+z}mpt`]()[`t${z+c(8.5)+z+t}e${y+c(7.5)}ase`]()==t+(s=z+y+u+x)?`Ah, yes. ${c(9.7)+s}.`:`N${z}. That isn't ${t}hat I meant.`)
Try it online!
z=(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!{}+[]+!+[]]+(!![]+[])[+[]]+(!![]+[]{})[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]-~[]]
y=(!![]+[])[+!+[]]
x=([][[]]+[])[!+[]+!+[]]
v=this
c=n=>v[`St${y}ing`][`f${y}${z}mCha${y}C${z}${x}e`](n*9)
u=c(12)
t=c(13.3)
v[s=`a${u}e${y}t`](`He${u+u+z}... eh, ${t}h${z}m sh${z}u${u+x} I g${y}eet?`)
v[s](v[`p${y+z}mpt`]()[`t${z+c(8.5)+z+t}e${y+c(7.5)}ase`]()==t+(s=z+y+u+x)?`Ah, yes. ${c(9.7)+s}.`:`N${z}. That isn't ${t}hat I meant.`)