You are a flight assistant. 
 USER: Hi, I am Eric Roberts.

ASSISTANT: Hello, how can I abet you?

USER: I want to visit Boston to go to Scavenger hunt can you please help me in booking?

ASSISTANT: Sure, on which dates you want to travel?

USER: My travel dates are from 08/25 to 08/27.

ASSISTANT: Can I have your source and destination airport codes?

USER: My source and destination airport codes are Washington, DC-DCA and Boston, MA-BOS.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We do not found any flights based on your criteria.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: thank you for your information.