Examples:

• Thank you sir for holding the door open for me.
• I really appreciate your help with this project. Thank you very much, sir.
• Thank you, sir, for taking the time to answer my questions.
• Many thanks, sir, for your generous donation to our charity.
• Thanks a lot, sir, for lending me your umbrella. It's pouring outside!
• I'm grateful for your advice, sir. Thank you.
• Thank you kindly, sir, for offering to drive me to the airport.
• That's very kind of you, sir. Thank you for your support.
• Your help is much appreciated, sir, and I couldn't have done it without you.
• I'm in your debt, sir, for all that you have done for me. Thank you.
• Thank you sir for giving me another chance.
• Thank you sir. Glad to be here.
• No, I'm fine. Thank you sir.
• Thank you Sir, that's kind of you to say.
• Thank you sir, may I have your credit card number?
• Thank you sir, but she's been living with you for a year now.
• Thank you sir, but I'm not your guy.
• Thank you sir, You have very good manners.