You can add multiple contact names and emails at one time directly on a trip. See the steps below on how to do this:
1. Open the Trip you want to edit
2. Click the ...More button and select People
3. At the bottom press Bulk Import from Spreadsheet (CSV):
4. Follow the instructions (be sure to pay attention to the format: Last Name, First Name, Email) and then upload your spreadsheet below and press Confirm and Add.