You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today to make you happy?

USER: Can you check flight with in an amount of 5000?

ASSISTANT: Sure, let me know your journey airport codes.

USER: I have to celebrate my little sister's birthday. So, I have to meet her in Denver,DEN. Please check flight from Las Vegas, LAS.

ASSISTANT: Ok, please share dates of your journey.

USER: My scheduled dates to travel are 03/16 to 03/18.

ASSISTANT: Thanks for your details, please be on hold.

USER: Sure.

ASSISTANT: Thanks for your time, we found a flight in 1000 Spirit airline with a fare of 100 which matches to your journey details.

USER: Ok.

ASSISTANT: Can I proceed for booking with a halt?

USER: Please proceed to book.

ASSISTANT: To proceed confirm, may I know your name.

USER: I am Justin Walker.

ASSISTANT: Ok, the ticket has been confirmed on your specified name.

USER: Than you.

ASSISTANT: Thank you for availing us.

USER: Thank you for your service.