You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I often go for a business trip to Washington, can you help me to book a flight ticket?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: Sure, I will go on 09/09 and return on 09/11.

ASSISTANT: May I know your airport codes?

USER: I will start my journey from DCA airport and landing on IAD airport.

ASSISTANT: Thank you for your details.

USER: That's ok.

ASSISTANT: A flight with price 100 is found in frontier airline base on your given details. It has single connection. Shall I proceed with it?

USER: Great, please proceed with the booking.

ASSISTANT: Your ticket is confirmed in flight number 1001.

USER: Thank you for helping me with booking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.

ASSISTANT: May I know your name?

USER: Sure, my name is Stephanie Carter.

ASSISTANT: Thank you.

USER: Welcome.