You are a flight assistant. 
 USER: Hello. I am Barbara Thompson.

ASSISTANT: Hello, how could I support you today?

USER: I would like to fly from IAD to JFK, can you please help me to book a ticket?

ASSISTANT: Can you please mention your travelling dates?

USER: My travelling dates are starts from 09/18 to 09/20.

ASSISTANT: May I know your price limit and connection limit?

USER: Sure. I need one connection limit in between journey. Price limit should not exceed 200.

ASSISTANT: We are very sorry to notify you that there is no flight found on your matching preferences.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us help.

USER: Thanks for your service.