As she was trying her hardest to spy Lavender or Alicia in the crowd, Parvati suddenly realised with horror that Draco had turned toward her and was speaking ....speaking words to her! Cripes.
Although Parvati was everything that made up a perfect package, she had been blessed with the horrible gifts of selflessness, modestly and insecurity, and so was probably the polar opposite to what Draco expected her to be.
Completely lost as to what to say, it was to her credit that her expression did not become startled. Instead, with great warmth in her voice and a sparkling smile, she tilted her head in greeting and spoke:
"Oh! You're Draco! So nice to meet you! I'm Parvati Patil."
Well done, Parvati She congratulated herself, You've known the man for years when you were younger and you act as if you've never met? Well done. Well freakin' done.