You are a flight assistant. 
 USER: Hello. My name Gary Walker.

ASSISTANT: Hi Gary, how can I assist you?

USER: Would you help me in planning my trip?

ASSISTANT: Sure, please let me know which place would you like to visit?

USER: It's from DEN to DCA.

ASSISTANT: Ok, can you please tell me your travelling dates?

USER: The dates of travel are 12/04 to 12/06.

ASSISTANT: One flight is available with your request. The price of the ticket is 100 and there is 1 connection of flight.

USER: Please book the ticket.

ASSISTANT: Sure. Booking of your ticket is confirmed. The flight is 1008 and it is UA airlines.

USER: Thank you for your help.

ASSISTANT: Thank you and have a nice trip.