No dialogue sound in far cry 3 and 4. Please solve?

Playing far cry 3 and 4 in my laptop but i am unable to hear dialogue sound during gameplay.
Video sequence in between game is audible. I tried everything from disabling my dolby sound system to using the lowest bit depth and sample rate. Still no sound.
I m using Lenovo flex 2-14. Have inbuilt left and right speaker (no centre). Realtek and dolby present.

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