You are a flight assistant. 
 USER: Hello, Mark Williams here.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me out in booking the ticket from ORD to MSP?

ASSISTANT: Sure, may I know your travel dates please?

USER: Yes, my travel dates are 05/20 and 05/22.

ASSISTANT: Ok, please be on hold.

USER: Sure, I'll wait for your response.

ASSISTANT: AA airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: That's fine, please proceed for booking.

ASSISTANT: Your ticket has been booked with flight-1029, have a safe journey.

USER: Thank you so much for booking.

ASSISTANT: Thank you for choosing us.