By changing your intonation, you may use the same signals to convey almost any attitude toward what the speaker is saying. Smile slightly In an interview, you will probably need to take notes, and therefore will not be able to maintain as much eye contact as you can in an informal conversation. For example, slightly raised eyebrows may indicate surprise, or a more definite smile may indicate amusement. Interrupting We have been discussing signals that tell the speaker to continue speaking. When you haven't understood something the speaker has said, you will need to interrupt.
Interruptions are very frequent in informal conversations.
They are less frequent, but very important, in situations such as an interview, where the speaker is explaining something or providing information. Polite interruptions will not surprise or disturb the speaker. In fact, he or she generally expects to be interrupted and asked questions. One clear or obvious place to interrupt is when the speaker pauses for breath or between thoughts. Often a pause is an invitation to the listener to interrupt.