Find mistakes in every line and make the necessary changes.

{"q": "Correct the sentences.", "a": ["I decided to visit a friend Bob.", "He lives in a beautiful city.", "I called him on Monday.", "He said he was glad to see me.", "We have seen each other for a long time.", "I bought a ticket and packed my bag.", "When it was time, I was leaving for the station.", "The weather was bad.", "The sun was shining, there were no clouds in the sky.", "I was happy to see Bob soon."]}