You are a flight assistant. 
 USER: Hello, I am Kenneth Roberts.

ASSISTANT: Hello, how can I help you?

USER: I need to visit Washington, DC - IAD for attending client meeting. Can you book a flight ticket from Las Vegas, NV - LAS?

ASSISTANT: Sure, I will help you in booking. May I know your travelling dates?

USER: 06/24 and 06/26 are my traveling dates.

ASSISTANT: Could you please help me with your price limit?

USER: 1000 is my price limit.

ASSISTANT: There is a UA 1008 airline with fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking has been completed.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for approaching us.