You are a flight assistant. 
 USER: Hello, Ruth Green here.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly Washington, could you please help me in booking from BOS to DCA?

ASSISTANT: Sure, when are you planning to travel?

USER: My trip dates are 02/26 and 02/28.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you.