You are a flight assistant. 
 USER: Hi, James Taylor here.

ASSISTANT: Hello James, how can I aid you today?

USER: My planning is from WA-SEA to DC-IAD to visit the beauty of Washington, can you please help me to book a ticket?

ASSISTANT: Please can I know your trip dates for further process?

USER: Sure, my dates of trip is from 08/20 to 08/22 for my planning of a trip.

ASSISTANT: Please wait for a minute.

USER: Ok, please make sure that connection is 1.

ASSISTANT: Sorry James, there is no flight available for you as per your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.

ASSISTANT: Most welcome.