You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Clark.

ASSISTANT: How can I serve you?

USER: I have a plan to visit the Microsoft theater to watch a movie with my college friend's in Los Angeles. Would you please book a flight ticket with one halt?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: My depart will be on 09/15 and arrival on 09/17.

ASSISTANT: Please share me your airport codes.

USER: My source point is IL-ORD and destination point is CA-LAX.

ASSISTANT: We found a Hawaiian airline, flight number:1002 and the price is 200.

USER: Ok, proceed with the booking.

ASSISTANT: Your flight ticket has been proceeded.

USER: Thank you for service.

ASSISTANT: Thank you for choosing us.