I think you already know the answer

Good evening [이름]!

You are really sweet! I am sure if Carolyn can read this, she will be really happy.

Communication is really important in a relationship.

We use postpaid and prepaid in the Philippines.^^

Postpaid is more expensive for people.^^

See you again.^^ Take Care!

Teacher Nina

I think you already know the answer

>> Correct!
Of course, It\'s Carolyn.

>> Correct!
We talk to each other everyday.

>> We are talking to each other everyday.

>> OR: We are having a conversation everyday.
the longest call time we have ever made is about 2h 15min .

>> The longest call duration that we had was around two hours and fifteen minutes.
In Korea, the cost of phone call is different from contract.

>> In Korea, the cost of phone call is different from the contract.
Our cost is not decided by How long we talked or How many times we called.

>> The cost is not decided by how long we talked or how many times we called each other.
It is fixed and more expensive than other phone cost.

>> It is fixed and more expensive than the other phone cost.

In my office I have to call many people. 

>> Correct

>> OR: I have to call many people in my office.
even a little expensive than other phone cost, Im satisfied with it.

>> It\'s even a bit expensive than the other phone cost, I\'m satisfied with it.