Echoes are easy.
But in an other point, Viv may be right. The opening isn’t meant to be recalled, just made familiar by repetition to create calm. The message needs to be short and to the point, while also trying to keep her calm and at ease. With dreams, you tend to remember the last few moments before you wake and, to use echoes another way, repetition of key points can also help get the message across even if it’s over multiple nights.
For example: If we say we’re friends of Augie, say we’re here to help her, then go on to say thing else, we’d need to repeat that we’re there to help again at the end of the message. The next night, we’d then use the same or very similar introduction to the conversation. We’re friends of Augie, here to help her etc.