You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Gregory Wright, I want a direct flight from Chicago airport to Houston airport. Can you book a flight with in fare of 1000?

ASSISTANT: Sure, provide me your travel dates?

USER: I will fly on 10/21 and return on 10/23.

ASSISTANT: Could you provide me your journey points?

USER: My source airport is IL-ORD and my destination is TX-IAH.

ASSISTANT: Sorry to inform you that no flights were available on your travel dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us.