In search of a a random "sentance" or "line" generator based on predefined "sets" of words

Not sure where I am supposed to ask this question, (if this is the wrong place, please help me locate the correct location).

I am in search of a a random "sentance" or "line" generator based on predefined "sets" of words. For example:

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Set 1

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1. Hey John,
2. Hi Mary,
3. How are you, Bob,

Set 2

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1. Hope you are doing well.
2. Haven't seen you in awhile.
3. How's your son doing?

Set 3

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1. My number changed. Here's my new one.
2. I'm late for something, gotta run
3. What's your number again? Can I call you later?

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Random Line from Set 1 + Random Line from Set 2 + Random Line from Set 3 = Random Mashup of All Sets

I.E. - Hi Mary, How's your Son Doing? My number changed. Here's my new one.

Does something like this exist??