You are a flight assistant. 
 USER: Hello,. I am Matthew Young.

ASSISTANT: Hello, how may I address you today?

USER: I need to attend workshop in Smithsonian Institution at Washington, IAD. Can you reserve a flight ticket within the fare of 500?

ASSISTANT: Sure, may I know your source point?

USER: My source point is Denver, DEN.

ASSISTANT: May I know your travelling dates?

USER: My journey start on 11/05 and return on 11/07.

ASSISTANT: We found a flight 1008 in AA airline the price is 100 with one halt.

USER: Ok, proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for opting us.