You are a flight assistant. 
 USER: Hello. I am Dorothy Thomas.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a ticket from LAS to IAH. Can you book a ticket?

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

USER: I have travelled on 01/13 and 01/15.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Southwest, flight number: 1001 and price is 100.

USER: You can book it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.