You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Samantha Smith. Can you help me with booking a flight ticket from IAD to LAS?

ASSISTANT: Sure, to book a ticket may I know when you are willing to travel?

USER: I would like to fly on 09/16 and arrival on 09/18.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a connecting flight. I can pay up to 5000.

ASSISTANT: We found a flight with an airline UA of flight 1028 and price is 100.

USER: Please reserve it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.