1) First thing he says "Can I buy you a drink". Unless she is his personal assistant, how would she know if he Can. He should be asking permission, ie MAY I buy you a drink.
2) How about. How are you. You look ........ Are you waiting for someone...
Remember, she is a highly intellegent and animated, lively member of a different sub-speceis, hence the differences in bilogy, biochemistry, anatomy and topology. Also remember she does NOT just want to a lab rat but a partner in interspecies exploration. While topologically significant differences may hold your interest, studies have proven that interest in the psychsocial aspects is what these creatures crave