You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to visit Denver zoo, could you book a ticket from DCA to DEN?

ASSISTANT: May I know your name to proceed further?

USER: My name is Jacob Lee.

ASSISTANT: Could you please provide your travelling dates?

USER: I am leaving on 08/01 and returning on 08/03.

ASSISTANT: There is a flight available with price 100 and flight number is 1000, would you like to proceed with the booking?

USER: Please proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you for assisting me.

ASSISTANT: You are welcome.