You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Nicole Adams, I want to book a flight of normal-cost airline to Las Vegas. Can you book a flight with in fare of 1000?

ASSISTANT: Sure, I will help you with booking. Can you please share your source airport code?

USER: My source airport code is SEA.

ASSISTANT: Ok, let me know your travelling dates?

USER: I will fly on July 21 and return on July 23.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code is LAS.

ASSISTANT: Thanks for your details, there is no flight found on your journey data.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.