My credit is for $120 = approximately 4,200 Baht.
This means I can book any AirAsia ticket, either one way or round trip, that costs about 4,200 Baht. I can book the ticket in the name of whoever want s to buy it from me. I will give a very good deal. I will sell the ticket to the person for half price. This means I can buy a flight for 4,200 Baht and then sell it for 2,100 Baht. The ticket can be booked for any month of the year and can be booked in anyone's name.
Very good deal. Do you understand? Do you have more questions?