You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I amend you?

USER: I am Michael Young. I would like to travel to Washington to give a presentation in my head office of Microsoft, please help me with booking a direct flight.

ASSISTANT: Sure. May I know your travelling dates?

USER: Sure, I want to fly on 06/24 and will return on 06/26.

ASSISTANT: Can you share your airport codes?

USER: Its from CO-DEN to DC-IAD.

ASSISTANT: Is there any restriction in price limit?

USER: I can pay up to 1000.

ASSISTANT: There is a flight 1020 in Hawaiian airline and price 100 with a connection. Shall I proceed?

USER: Yes, please.

ASSISTANT: Ok, Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you.