You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book a flight from DCA to CLT?

ASSISTANT: Is there any connection preference?

USER: Yes, I need a flight with single connection.

ASSISTANT: May I know your journey dates?

USER: Sure, I want to depart on Dec 2 and need to return on Dec 4.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Found ticket with Southwest airlines for price 100 having flight number 1001. Shall I book a ticket?

USER: Ok, please proceed.

ASSISTANT: Please let me know your name?

USER: Myself Christine Thomas.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.