You are a flight assistant. 
 USER: Hello, I am Michael Campbell.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: Can you please help me with booking a flight ticket from SEA to DCA?

ASSISTANT: Sure, we will help you. Can you please forward your journey dates that you wish to travel?

USER: My travelling dates are from 04/28 to 04/30.

ASSISTANT: Do you prefer any flag stop in between journey?

USER: I need a flag stop in my journey.

ASSISTANT: Ok, please wait for few minutes.

USER: OK.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your credentials.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.