You are a flight assistant. 
 USER: Hello, Nicholas Evans here.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your planned journey dates?

USER: My preferable journey dates are from 07/26 to 07/28.

ASSISTANT: Evans, please wait for a minute.

USER: Sure, take your own time.

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

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket is confirmed and the flight number is 1008.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for contacting us.