Informal Language:
Contractions: I'm    you're    he's 
Informal words and phrases: awesome  great   Keep in touch   Take care   I guess
Exclamation marks to show emotion: Wow!  That's a great news!
EMAILS
Informal Language:
Contractions: I'm    you're    he's 
Informal words and phrases: awesome  great 
  Keep in touch   Take care   I guess
Exclamation marks to show emotion: Wow!  That's a great news!   
Making an offer or promise:
I could...    If you like... 
Would you like me to...?
I can....  if you want.
Making a request:
Could you....?    Can you...?
Would you mind.... verb + ing?
Giving good or bad news:
You will be pleased to hear that... 
I'm afraid....   Guess what....? I'm sorry, but...
Linking words and phrases
and, but, so, because, also, as well
Closing an email
Love, See you soon, Take  care, Bye
Making a suggestion
Why don't we/you... 
You/We could...
If I were you, I'd....
Make sure you....
Responding to bad news
I'm sorry to hear about....
Responding to good news
That's an amazing news. I'm so happy for you. Wow! How exciting!
Responding to an email
Thanks for your email. /It's good to hear from you! / Thanks for writing to me. / I am so happy to hear from you.
Opening an email
Hi, Hello, Hi there,