Answer:
Yes I can tell whether or not the person is friendly or not
Step-by-step explanation:
The first thing is that friendly conversation companion is the one who will be available for you to talk and answers you with logics and is more kind.
If I called a person in my past and my experience was that he answered me in an ethical manner, without any hesitation and talks to me freely about the matters and considerations involved with the topic then the person is friendly. Furthermore, the time you are calling him or her and the situation he or she is in sometime have effect on the conversation. If I have done wrong to someone then greater chances exist that the person will not be friendly and vice versa.