Given the task definition and input, reply with output. From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

Given Relationship: 'be city in', Sentence: 'Reserve your stay online using RatesandAvailability .com 's simple interface to thousands of international destinations including popular cities like Cabo Can Lucas - Mexico , Helsinki - Finland , Mazatlan - Mexico , and Athens - Greece .'
cities