You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: Please book a ticket from Las Vegas, NV-LAS to Denver, CO-DEN.

ASSISTANT: Sure, kindly mention travel dates?

USER: My travel dates are from 01/11 to 01/13.

ASSISTANT: How much can you afford for this journey?

USER: Price limit is 200.

ASSISTANT: May I know your name?

USER: I am Janet Nelson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Thank you.

ASSISTANT: Thanks for reaching us..