You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I aid you?

USER: I am Jonathan Brown, I want to book a flight ticket.

ASSISTANT: OK, we are here to serve you. To proceed further, we need to know your journey details please.

USER: Sure, I want to travel from Oakland CA-OAK to Chicago IL-ORD. And my dates of travelling are from 12/02 to 12/04.

ASSISTANT: OK, is there any other requirements?

USER: I am looking for a single connection within price limit 1000.

ASSISTANT: OK, please wait for a while. I will check the availability and revert you back.

USER: Sure.

ASSISTANT: Thanks for being patient, we did not find any flight available as per your requirements.

USER: Thank you, I appreciate your help.

ASSISTANT: Thanks for choosing us.