Interpreter and interview booking

I am looking for an interpreter who can help me book interviews with clients in Cambodia. You will also come with me to translate the conversations as most of my clients hardly speak any English. The business trip is expected to be organised as soon as you can book interview dates. Requirement for this job: you must be based in Cambodia (Phnompenh ideally), can speak local language (Khmer) and fluently in Vietnamese and/or English.