补全对话：
根据中文提示, 把对话中缺少的内容写在线上。这些句子必须符合英语表达习惯。打句号的地方, 用陈述句；打问号的地方, 用疑问句。
提示：Henry准备去上海开会, 打电话到航空公司订票, 工作人员Lillian接听了电话。
(L= Lillian；H = Henry)
L：Hello! This is Air China.        1       ?
H：Hello. I'd like to book a flight from Beijing to Shanghai.
L：Sure.        2       ?
H：This Saturday morning July 12.
L：OK. How many tickets?
H：       3       .
L：So, that's one ticket from Beijing to Shanghai.
H：       4       ?
L：Well, that will be 1,030 yuan.
H：OK. Can I book that now?
L：Certainly.
H：       5       .
L：You're welcome.