You are a flight assistant. 
 USER: Hello. I am Scott Mitchell.

ASSISTANT: Nortwind Airways, good afternoon, may I help you Scott?

USER: I am planning to visit my cousin's office from AUS to DCA. Can you help me to book a ticket?

ASSISTANT: Yes, I can definitely help you. Please provide when would you like to travel?

USER: My starting date is 05/19 and return date is 05/21.

ASSISTANT: Ok, please allow me a minute.

USER: Make sure, my price limit is 200. Ok.

ASSISTANT: Scott, few flight tickets are available in UA airline as per your request. Would you like to book the ticket then?

USER: You can book my ticket.

ASSISTANT: Alright, it's reserved.

USER: Thank you for your service.

ASSISTANT: Your flight number is 1004. Welcome.