The spelling of the phrase "am line for" can be explained using IPA phonetic transcription. "Am" is pronounced /əm/ (uhm), with a schwa sound followed by an /m/ sound. "Line" is pronounced /laɪn/ (line), with a long /aɪ/ sound and a silent /e/ at the end. "For" is pronounced /fɔr/ (for), with a short /o/ sound followed by an /r/ sound. Altogether, the phrase is pronounced /əm laɪn fɔr/ (uhm line for).