dialogue vs talks

dialogue and talks both are nouns.

Word	Noun	Adjective	Verb	Adverb
dialogue	Yes	No	No	No
talks	Yes	No	No	No

As nouns, dialogue and talks are synonyms defined as:

Other synonyms of dialogue include negotiation.

dialogue (noun)	talks (noun)
the lines spoken by characters in drama or fiction	a discussion intended to produce an agreement
a conversation between two persons
a literary composition in the form of a conversation between two people
a discussion intended to produce an agreement