These are few basic rules that you need to follow. This is important and it matters when you talk to clients or your peers in the team.
@X Thank you for connecting me to Y. Adding you to BCC to save your inbox. Hi Y, ... Thank you! - Your Name.
Small talk when you begin the call. This is important (and even more important if the client is from the west). You’re building a relationship with the client, and not just working with him. Do not small talk about weather. That’s just wasting time. Be creative.
Be polite. You’ll be flagged as rude even if you did not mean it. This has happened several times in the past. Use words like “Thank you!”, “Sorry.”, “Please” often.
End the call with “It was great talking to you. Thank you for your time today, Have a great rest of your day” or something as such.