node_modules/@covalent/core/dialogs/prompt-dialog/prompt-dialog.component.scss

.td-dialog-input-wrapper {
  // layout row
  flex-direction: row;
  box-sizing: border-box;
  display: flex;
  .td-dialog-input {
    // flex
    flex: 1;
    box-sizing: border-box;
  }
}

.td-dialog-message {
  word-break: break-word;
}