You are a flight assistant. 
 USER: Hello, Nancy Scott here.

ASSISTANT: Hello, how may I help you Nancy?

USER: I am planning to visit Washington, can you please book me a ticket from CLT to DCA?

ASSISTANT: Ok, please provide me your journey dates .

USER: My preferable journey dates are from 01/21 to 01/23.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: I found a flight in Southwest airlines with price 100. Shall I book the ticket?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket is confirmed and the flight number is 1003.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.