我看不出以下代码有什么问题：
elif choice == "2":
while True:
PhoneSearch = raw_input("What is their telephone number? : ")
conn = sqlite3.connect('SADS.db')
cur = conn.cursor()
cur.execute("SELECT * FROM customers WHERE Telephone = (?)",(PhoneSearch,))
row = cur.fetchone()
if row:
CustID = row[0]
print "|------------------------------------------|"
print "|Customer ID : " , row[0]
print "|Forename : " , row[1]
print "|Surname : " , row[2]
print "|Address Line 1 : " , row[3]
print "|Address Line 2 : " , row[4]
print "|City : " , row[5]
print "|Postcode : " , row[6]
print "|Telephone number : " , row[7]
print "|E-Mail : " , row[8]
while True:
print '|Do you want to see what seats', row[1]
choice = raw_input("|Choice Y/N:")
if choice == 'Y':
cur.execute("SELECT * FROM seats WHERE CustID = (?)", (CustID,))
rowseat = cur.fetchone()
if rowseat: # or if rowseat is not None, etc.
print "|Seats booked:" , rowseat[0]
print "|------------------------------------------|"
break
else:
print("database doesn't have correct info")
else:
print("Na")
然而，我在顶部的 Elif 语句上遇到语法错误。请告诉我为什么会发生这种情况或错误在哪里？