Dialogues

1. 祝你生日快乐!Zhù nǐ shēngrì kuàilè!
Happy birthday
Happy birthday!
We are to attend a friend's birthday party this time. In English we say happy birthday when attending a birthday party. In Chinese You can say zhu4 ni3 sheng1ri4 kuai4le4!
祝. It means offering good wishes.
你 is you.
生日 means birthday.
Actually 生means be born. And 日 is date. So put together 生日, birthday.
快乐 means happy.
And one of the responses to this could be 谢谢, which we learned last time. 

2. 干杯!Gān bēi!
Cheers!
Cheers!
It's quite often that we hold a birthday party and invite friends to celebrate it together. And we drink wine quite often. In English we say "cheers".In Chinese you can say "干杯".gan1 is to dry. And bei1 means cup."干杯", Cheers!
The answer to 干杯 can be the same.

3. 你的电话号码是多少?Nǐ de diànhuà hàomǎ shì duōshǎo?
What's your telephone number?
What's your telephone number?
In the end of the party, we would see our friends off. You may need phone numbers of some new friends. In this case, you can say "ni3de dian4hua4 hao4ma3 shi4 duo1shao3"
"你的" means yours.
"电话" is telephone.
"号码" means number.
电话号码-- telephone number.
"What's" in Chinese is "是多少",
"你的电话号码", your telephone number.
"你的电话号码是多少"?