Hello,

Here are few things that will help you out.

• First point to remember is practice makes a man perfect
• Know the format of interview
• Dress like a pro.it means dress code should be decent as well as professional
• Be ready for common questions
• Ask further questions 
• Don't be late.Even if you are late apologize and confidential to tell what exactly happened.
• Practice how you are really facing it.
• Be confidential polite and have a better fluency.

Done with all these you are perfect now to face it.

Best of luck