To help passengers, suggesting, troubleshooting, Terminal, because some passengers have used the service in the airport, and is the first to make the passengers feel confident to travel.
Passenger assist, advise, fix the passengers. Because some passengers had used the service in airports and travel for the first time had to make passengers feel confident in the journey.
To help passengers, introduce, the solution to the passengers. Because some passengers had used in airports and travel for the first time is to make the passengers feel confident in the journey.