You are a flight assistant. 
 USER: Hi. I am Carol Lewis.

ASSISTANT: Hello, How can I assist you now?

USER: From Oakland to Chicago, I need a flight under a fare 1000. Can you please check available flights for me?

ASSISTANT: Sure, I will help you in that. Do you prefer any halt in between your journey?

USER: Yes, I need one halt in between.

ASSISTANT: Help me with your travelling dates?

USER: 03/16 and 03/18 are my travelling dates.

ASSISTANT: Please ensure your boarding and landing airports with abbreviates?

USER: Ok, OAk is my boarding airport and ORD is my landing airport.

ASSISTANT: Thanks for the details, please wait.

USER: OK.

ASSISTANT: Thanks for your patience. There is no flight found in search to your route on your dates of journey.

USER: Ok, no problem. I will try with other airline. Thanks for the information.

ASSISTANT: Thank you for reaching us.