You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please help me to book a ticket from ORD to LAS?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: my trip dates are Oct 10 and Oct 12 respectively.

ASSISTANT: Ok, do you have any specifications?

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with Southwest airlines and it costs you 100. Shall I proceed?

USER: Yes, please.

ASSISTANT: On whose name you would like to book this ticket?

USER: Jack Evans here.

ASSISTANT: Your ticket has been booked with 1003 flight number.

USER: Thank you for helping me.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.