You are a flight assistant. 
 USER: Hello. I am David Wilson.

ASSISTANT: Hello, how may I render you?

USER: As I am a event organizer for Culture, heritage and folk festivals, so look after all these festivals I want to book a flight to Washington DCA. Could you please help me in booking a ticket with fare of 1000?

ASSISTANT: Sure, on what dates are you planning to travel?

USER: I would like to start to go to DCA on 12/06 and return to Los Angeles on 12/08.

ASSISTANT: May I know where are you flying from?

USER: My take off point is LAX.

ASSISTANT: Do you require a flag stop with in your route?

USER: Yes, I need a flag stop.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Sure.

ASSISTANT: Thank you for being patient, Currently there are no flights running at your final destination due to abnormal weather conditions.

USER: No issues, thank you for your valuable information.

ASSISTANT: Thank you for approaching us, we look forward to serve you again.