You are a flight assistant. 
 USER: Hello. I am Michelle Turner.

ASSISTANT: Hello, Michelle Turner, how can I provide assistance to you?

USER: I want to attend my board meeting in Washington, help me in booking my flight ticket.

ASSISTANT: Sure, we are happy to help you.

USER: My airport codes are from MA-BOS to DC-DCA.

ASSISTANT: Can you please provide your journey dates?

USER: My journey days are from 05/22 to 05/24.

ASSISTANT: Thanks for your details, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your patience, we are sorry to say that no flights were found based on your schedule.

USER: Its ok ,thank you for your information.

ASSISTANT: Thank you for opting our service, have a nice day.