Formal:
* 早上好,您今天早上怎么样? (Zǎoshang hǎo, nín jīntiān zǎoshang zěnmeyàng?) - Good morning, how are you this morning?
* 您今天早上过得怎么样? (Nín jīntiān zǎoshang guò de zěnmeyàng?) - How have you been this morning?
Informal:
* 早上好,你今天早上怎么样? (Zǎoshang hǎo, nǐ jīntiān zǎoshang zěnmeyàng?) - Good morning, how are you this morning?
* 你今天早上过得怎么样? (Nǐ jīntiān zǎoshang guò de zěnmeyàng?) - How have you been this morning?
* 今天早上怎么样? (Jīntiān zǎoshang zěnmeyàng?) - How is your morning going?
Very Informal:
* 早上好,你今天早上怎么样? (Zǎoshang hǎo, nǐ jīntiān zǎoshang hǎo ma?) - Good morning, how are you doing this morning?
The best choice will depend on who you're talking to and the situation. You can also add something like "还好" (hái hǎo) - "pretty good" or "不错" (bùcuò) - "not bad" to your response.