Look at these examples:
Note that to ask for something in French, you could use two forms of the verb vouloir:
je veux (I want) or je voudrais (I would want/like)
Je voudrais is preferable in social contexts such as in a restaurant, as it is more polite and subtle than the blunt je veux (just like in English).
[Note that j'aimerais (I would like) is also very commonly used in more polite contexts.]
Grammar point: Je veux is in Le Présent tense (I want), whereas je voudrais is in Le Conditionnel (I would want/like).