You are a flight assistant. 
 USER: Hello. I am Nancy Phillips.

ASSISTANT: Hello, how can I amend you?

USER: I am planning to go for Febway park at Boston, BOS. Can you please book a direct flight for me?

ASSISTANT: Sure, I will help you. May I know your airport codes?

USER: Source code is Washington, DCA.

ASSISTANT: Please share me your trip dates?

USER: Travelling dates are 08/22 to 08/24.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights on your specified dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for availing us, have a good day.