Well first of all, good job in trying something new but...
Grammar needs some serious improvement
Remember to capitalize I's
You've used incorrect punctuation for speech, either do something like i've done in my story for phone calls or use "quotation marks" and make sure you take a new line everytime someone talks instead of writing" then Sehwag said bye and I said bye back"
Try to do something like:
Hello
Hey Aditya, it's Sehwag
Is it really you?
:laugh Yes it is, remember we met at ...
or
I picked up the phone,
"Hello?"
"Hey Aditya, it's Sehwag"
I couldn't believe it, was it really him?
"Remember we met at Kotla..."