spawn - command not found!

I am using Mac OS X 10.9.4, following is my script to copy files from local machine to different host

#!/bin/bash
#!/usr/bin/expect

echo "I will fail if you give junk values!!"
echo " "
echo "Enter file name: "
read filePath
echo " "
echo "Where you want to copy?"
echo "Enter"
echo "1. if Host1"
echo "2. if Host2"
echo "3. if Host3"
read choice
echo " "
if [ $choice -eq "1" ]
then
  spawn scp filePath uname@host1:/usr/tmp   
  expect "password"   
  send "MyPassword\r"
  interact
elif [ $choice -eq "2" ]
then
  spawn scp filePath uname@host2:/usr/tmp   
  expect "password"   
  send "MyPassword\r"
  interact
elif [ $choice -eq "3" ]
then
  spawn scp filePath uname@host3:/usr/tmp   
  expect "password"   
  send "MyPassword\r"
  interact
else
  echo "Wrong input"
fi

when running this script i am getting following

./rcopy.sh: line 21: spawn: command not found
couldn't read file "password": no such file or directory
./rcopy.sh: line 23: send: command not found
./rcopy.sh: line 24: interact: command not found