You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to search a flight from DC-DCA to DC-IAD?

ASSISTANT: Sure, can you share your travelling dates of journey?

USER: The travelling dates are 03/27 to 03/29.

ASSISTANT: May I know your name?

USER: My name is Helen Lewis.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.