On the problem of booking air tickets online by SMS.

Maybe your family helped you get a membership card of this airline, or maybe your family is a senior member of this airline and got you a supplementary card, and the mobile phone number you left when you got the card is your family's mobile phone.

So after you buy a plane ticket, the airline system will automatically match your name and ID number, and will automatically accumulate mileage for your membership card.

I will also send a text message to the reserved mobile phone number.