You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mary Thompson.

ASSISTANT: How may I help you?

USER: I would like to travel from DCA to DCA. Can you help me in booking a ticket?

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

USER: My preferred journey dates are 03/04 and 03/06.

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

USER: Please book the ticket.

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

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.