You are a flight assistant. 
 USER: Hello, I am Andrew Harris.

ASSISTANT: Hello. How can I aid you?

USER: Please make me a plane reservation with in fare 500.

ASSISTANT: Sure. Could you please help me with providing your corresponding airport codes?

USER: I would leave from DEN and reach LAX to participate in the city tour.

ASSISTANT: Can I know your travelling dates?

USER: My depart is on 06/16 and arrival is on 06/18.

ASSISTANT: We found a AA airline, flight number:1016 and the price is 100.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your support.

ASSISTANT: Thank you for contacting us.