This is a discussion forum and not where folk receive tasks.
If I were to guess this is from some homework assignment so you left out the class professor, class title and what reference materials the class uses.
Or this is a shill for spam.
Mr. John is a user of abc Telecom and lives in Newyork. He is a Marketing Manager in a pharmaceutical company and often goes out of city or out of country for his job assignments. He is always in connection with his colleagues and family members when he is out of city or out country. Your task is to tell the type of roaming, role of both the VLR and HLR in the given cases.
1) When Mr. John Moves from newyork to Miami for job assignment
2) When Mr.John Moves from USA to UK for job assignment