I'm expecting to hear from you soon.
I'm expecting to have a talk with you soon.
Or
I'm expecting to hear from you soon.
I'm expecting to have a talk with you soon.
I'd expect to see look forward to in formal contexts, rather than normal everyday conversation. And I'm not the only one.
These sentences are usually email closings. See this and this or this for more info on how to write an appropriate email closing.
Footnote: The original revision of OP had a grammar error. I move the correction down here.
Grammar polishing time!
I look forward to *talk with you.
I look forward to *hear from you.
The structure "look forward to" is followed by a gerund. (Take a look at this question) Also a Google search might bring up relevant results. I got this tutorial as the first result. So, the correct forms of your sentences are
I look forward to talking with you.
I look forward to hearing from you.