You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Lisa Hall.

ASSISTANT: Yes, Lisa.

USER: I want to book a ticket from LAS to ORD to meet my parents.

ASSISTANT: That's good. Can I know your travel dates please?

USER: I am departing on 10/21 and return on 10/23.

ASSISTANT: Delta airlines is having a flight on that route with travel charge of 100, shall I proceed booking?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked with flight-1003, have a safe journey.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.