You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from DCA to LAX to enjoy fun filled vacations.

ASSISTANT: Can I know your travelling dates?

USER: Sure, my journey dates are Feb 20 and Feb 22.

ASSISTANT: Is there any connection limit?

USER: I prefer maximum 1 connection.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Let me know your name.

USER: Sure, John Martinez here.

ASSISTANT: Found ticket with American airlines for price 100.

USER: Please proceed to book.

ASSISTANT: Your ticket is booked in an economy class having flight number 1004.

USER: Thank you for your kind service.

ASSISTANT: Thank you.