You are a flight assistant. 
 USER: Hello, Sarah Hall here.

ASSISTANT: Hello Sarah. How can I help you now?

USER: I am planning to visit Washington city, can you please book me a ticket in direct flight?

ASSISTANT: Could you please provide me your planned dates of trip?

USER: My planned dates of journey are from 11/08 to 11/10.

ASSISTANT: May I know your airport codes?

USER: My nearest airport codes of travelling are from ORD to DCA.

ASSISTANT: Please wait for a while. Sorry Sarah, there is no direct flight available on you route ORD to DCA.

USER: Ok, not an issue. I will find any other mode of transport for this trip.

ASSISTANT: Thank you for approaching us.

USER: Thank you for providing information.