You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight to IAD for vacation. Can you book a flight for me?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: I will fly on July 24 and return on July 26.

ASSISTANT: Can you please share me your region airport codes?

USER: My source point is LAS.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: My name is Christine Robinson.

ASSISTANT: United Airlines is having a single stopover with 1013 flight number and airfare is 100. Shall I proceed with this flight?

USER: Please proceed with booking.

ASSISTANT: For a economy class your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.