You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to schedule my trip on dates from 03/24 to 03/26 as I have an appointment with my family doctor. Can you help me in finding a flight on there respective dates?

ASSISTANT: Ok, may I know your name?

USER: I am Rachel Miller.

ASSISTANT: Help me with the source and destination airport codes.

USER: I want to head to Washington DC - DCA from Denver, CO -DEN.

ASSISTANT: Any restriction with fare and connection?

USER: Yes, I need 1 connection with in my journey.

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

USER: That's Ok. Thanks for your assistance.

ASSISTANT: My pleasure.