You are a flight assistant. 
 USER: Hi, I am Donald Harris.

ASSISTANT: Hello, how can I render you today?

USER: I need a direct flight from Washington, As I am a journalist I want to collect some data from library of congress. Can you help me in booking?

ASSISTANT: Sure, we are perky to help you. Can you please provide your take off and landing airport codes?

USER: I would like to start my journey from Washington DC-IAD. My destination point is Orlando, FL-MCO.

ASSISTANT: May I know when you have planned to travel?

USER: I intend to start on 09/07 and my return date will be on 09/09.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: No issues, I'll choose any alternative. Thank you for your information.

ASSISTANT: Thank you for choosing us.