You are a flight assistant. 
 USER: Hello, I am Rachel Allen.

ASSISTANT: Hello, how could I serve you today?

USER: Can you book me a flight ticket with price under 200?

ASSISTANT: Sure, I will book a ticket for you. Could you please put forward your travelling dates?

USER: I would start on 06/17 and return on 06/19.

ASSISTANT: Ok, can I know your connection limit?

USER: I need one lay by with in my route.

ASSISTANT: Ok, provide your source and destination airport codes?

USER: I need to reach Lincoln memorial in Washington DC - DCA from Oakland, CA - OAK.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we find a flight with couple of connections which does not matches your connection limit.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.

USER: Thanks for your response.