You should simply nod and smile to them. Monks do not return a wai . To execute the wai , place the palms of your hands together, with your fingers together and extended upward, close to your body at chest level-and bow slightly. The higher the hands are placed for a wai , the more respect is shown-so subordinates might raise their fingers as high as their noses. However, the tips of the fingers should never be above eye level.
Introductions are common only in formal situations.
You should introduce yourself by your first name. If introducing a business partner to an important Thai, mention your partner's name first. The person of lower rank or status is always introduced first. For example, a child is introduced before his or her parents are introduced, and a subordinate is introduced before his or her boss. Respecting the Elderly Always show respect for an elder, regardless of his or her rank.