You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Thompson here.

ASSISTANT: How can I assist you Mary?

USER: I would like to attend to my friend marriage in Chicago, so please help me in booking a ticket from LAX to ORD.

ASSISTANT: Sure, can I know the trip dates please?

USER: The travelling dates are from 10/23 to 10/25.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: There is a flight with price 100 in UA airline, shall I book it?

USER: Please proceed booking my ticket.

ASSISTANT: Your ticket has been booked with flight number 1004.

USER: Thank you for your help.

ASSISTANT: You are welcome.