You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking for a flight from DCA to LAX, can you help me out?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My travel dates are from 10/04 till 10/06.

ASSISTANT: Please wait for a moment, let me check for a best flight on your route.

USER: Ok.

ASSISTANT: May I know your name to proceed further?

USER: Myself Angela Johnson.

ASSISTANT: Sorry Angela, no flight is available on your route.

USER: That's ok, no probelm.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.