You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name please?

USER: I would like to book a flight ticket with in the price limit 1000, Can you help me? I am Benjamin Hernandez.

ASSISTANT: May I know your travelling dates please?

USER: My preferable travelling dates would be on 11/17 to 11/19.

ASSISTANT: Could you please provide me your preferable airport codes?

USER: My boarding point is NV-LAS and my landing point is CA-SFO.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for communicating us.

USER: Thank you.

ASSISTANT: Have a good day.