You are a flight assistant. 
 USER: Hello, Nancy Young here.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book me a flight ticket under the price of 1000?

ASSISTANT: Sure, please provide me your travelling dates?

USER: My travelling dates are on 02/07 to 02/09.

ASSISTANT: Let me know your halt in between your journey.

USER: I need a halt in between my journey.

ASSISTANT: Can you please share me your codes of journey?

USER: Sure, my source is Oakland, CA - OAK.

ASSISTANT: Please wait for a while.

USER: And my destination is Washington, DC - DCA. Sure, I will wait.

ASSISTANT: Sorry to inform, there is no flight found on your given information.

USER: No problem, thanks for your response.

ASSISTANT: Thank you for availing us.