Ojt narrative report from a bank?

Writing dialogue is not as hard as you're letting it seem. You have dialogue all the time -- it's called talking. If you honestly cannot think of what your characters are going to say to one another, you need to go take a break and go somewhere out in public. Sit somewhere in the middle of a crowd for one to two hours and just listen to people talking. Then, go home and write down some of the things you heard people saying. That's dialogue.

When you need to have your characters talk, just pretend it's you and a friend (or several friends), and have them say something you'd probably say in the same situation. Then imagine what your friends would say in reply, and go back and forth that way. As you become a better writer, your characters themselves will "tell" you what they want to say, because they become like real people to you.

your question wasn't very clear but if you wanted a dialogue between two people this might be a possibility depending on your Word limit this should help you continue:

reporter: this is _____ reporting live for channel_____ news ( blanks for names) we are at the scene where a bank robbery was just reported. with us we have an eye witess helping the authorities for further investigation. tell us what you saw.

witness: well first i heard this loud sot...it sounded like a rifle had been fired i was in the bank withdrawing some money and this man with a burglary look barged in with a rifle in his hand he threatened to rape the cashiers and took the loot and ran of........we ran for cover as soon as he left.......