1. INVITATION

- Invitation is wishes from someone that contains by news or information to other people in order she/he can accept it throughhabitual in fact or not.

- Invitation tells about how to invite or ask someone to come along or join a particular program or activity.

- How to invite the someone

• I would like to...
• We would be pleased if you could...
• Would you like to...?
• Shall we...?
• How about...?
• If you don't mind, please come to my house tomorrow
• Let's have dinner together with me tonight
• Would you mind coming to my birthday party ?

- How to accept an invitation ?

• Thank you. Yes, I would like to...
• Yes, I would. Thanks..
• That would very nice. Thank you.
• All right
• OK
  
• I will come
• I would love to...
• Why not ?

- How to refusing/declining an invitation ?

• I would love to, but...
• That's nice. Unfortunately...
• That's great. However...
• That's very kind of you, but...
• Sorry that wouldn't be possible. Thanks anyway.
• I can't for now because I'm busy
• I'm afraid I can't

Example in the dialogue :
Pamela : Hi ! I have a party tomorrow night. Would you like to come ?
Mita : That sound be fun !
Pamela : How about you, Gita ?
Gita : Actually, I want to join, but unfortunately I can't..
Pamela : Oh..That's fine.