You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Jason Garcia. I want to book a direct flight ticket to attend my Granny's funeral in Washington. Could you help me in booking a flight ticket?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My departure is 09/24 and return date on 09/26.

ASSISTANT: May I know your airport codes?

USER: My starting point from New York, NY - LGA and destination is DC - IAD.

ASSISTANT: Thank you for your details. Sorry, we did not found any direct flight based on your given details?

USER: Not an issue. Thanks for your service.

ASSISTANT: Thank you for reaching us.