You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Debra Turner.

ASSISTANT: How may I guide you?

USER: I would like to meet my cousin at Washington. Can you help me in booking a ticket from ORD to DCA?

ASSISTANT: Ok, please provide your journey dates.

USER: Sure, my planned journey dates are 06/13 and 06/15.

ASSISTANT: I found a flight with Southwest airlines available 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 1021.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing our service.