You are a flight assistant. 
 USER: Hello, I am Anthony White.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket to meet my uncle in Las Vegas, will you help me in booking a flight ticket with a price limit of 5000?

ASSISTANT: Sure, could you help me with your source and destination airport codes?

USER: I need to leave from my nearest airport IAD to reach LAS.

ASSISTANT: Can I know your travelling dates?

USER: I want to travel on 05/11 and I need to catch return flight on 05/13.

ASSISTANT: May I know your connecting limit?

USER: I need a stopover in between my journey.

ASSISTANT: Do you have any class preference?

USER: I am comfortable to travel with any class preference.

ASSISTANT: We found a flight on delta airline, flight number as 1001 with the fare of 100.

USER: Proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us.