You can book directly in a well known travel site like https://www.expedia.com/ , https://www.cheapair.com/ , https://btctrip.com/ . I will not recommend dealing with travel bookers here who will offer you a discount because it may only cause you complications. It's best to book directly in one of the travel site I have mentioned and you can easily request what you want and what you need in their support. Beware of newbies account which will try to offer you a service around here in the forum ( I am sure there will be some ) make sure to background check and ask for previous works if you will deal with them.