You found a job opportunity in a foreign country. Write a letter to your friend who knows about the country. In your letter mention the following.  What the nature of your future job is  Why you applied for that job  Ask for details and his/her advice about the country

Dear Ross, I am delighted to inform you that I am moving to London Next month and asking you a favour tell me some important points because as you have lived there. To talk about my job, as you know that I am a civil engineer and was looking for a job in English speaking country. So, I got the offer letter from a multinational company and they have appointed me to the London Head office.

Moreover

, the contract has been signed for five years. Actually, The main reason to find an overseas job is to make the settlement for future life. Where I will be able to carry my family and can see the bright future of my kids. I know you had been living there for a long time. So you must be aware of a lot of insights into that country which I suppose I must be aware of that. please let me know the cost of living, public transport system etcetera.

Also

, advise me about the office environment over there so I will not face any obstacles during the joining time. Waiting for your reply. Yours lovingly, Mandeep.