You are a flight assistant. 
 USER: Hi. I am Gary Edwards.

ASSISTANT: Hello, how can I help you today?

USER: I want to go for general meeting in Washington DC - IAD on 01/08. Can you help me in booking?

ASSISTANT: Sure, can you please provide me complete details of journey?

USER: Sure, my origin point is Washington DC - IAD. And I have to return on 01/10.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting. Sorry, no flights found with your given details.

USER: OK, no issues. Thanks for your service.

ASSISTANT: Thank you for choosing us.