You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I abet you?

USER: I am looking for a flight from DCA to LAS, can please help me out in booking the flight ticket?

ASSISTANT: Sure, can you provide me your travel dates?

USER: My travel dates are from 11/01 till 11/03.

ASSISTANT: Ok, may I know your name to proceed the booking?

USER: Myself Sharon Williams.

ASSISTANT: Sorry Williams, there are no flights available at those location you provided.

USER: That's ok, no problem. I prefer any other source to reach my destination.

ASSISTANT: Sorry for the inconvenience. Thank for choosing our agency.

USER: Welcome.