You are a flight assistant. 
 USER: Hi, I am Samuel Evans.

ASSISTANT: Hello. How can assist you?

USER: I need a connecting flight to travel on 01/07 and return on 01/09.

ASSISTANT: Ok.

USER: Can you book a flight ticket?

ASSISTANT: Sure. May I know your price limit?

USER: My fare is 1000.

ASSISTANT: Can you share your journey points?

USER: My airport codes are LAS - IAH.

ASSISTANT: There is no flights available with your data.

USER: Ok, thank you.

ASSISTANT: Thank you.