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 Welcome to CSIE Train Booking System 
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Please select the shift you want to book [902001-902005]: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 30
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> You cancel the seat.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 1
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> You cancel the seat.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 10
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> You cancel the seat.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 10
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> You cancel the seat.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: 
Booking info
|- Shift ID: 902001
|- Chose seat(s): 40
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> You cancel the seat.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> No seat to pay.

Booking info
|- Shift ID: 902001
|- Chose seat(s): 
|- Paid: 

Select the seat [1-40] or type "pay" to confirm: >>> Invalid operation.