You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Kathleen Anderson here, I would like to travel from EWR to DCA, can you please help me in this intent?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my dates of journey is from 02/18 to 02/20.

ASSISTANT: There is no flights available.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Most welcome.