What are some signs in a person's behavior that could indicate that he/she wants to apologise?

If someone calls me after months and desires to meet me for just few minutes, saying that there is no personal motive behind, and that if I could only lend 10 minutes, is the person trying to apologise? In the past there was a drift in our relationship due to misleading acts by both of us.
What are some signs in a person's behavior that could indicate that he/she wants to apologise?
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