You are a flight assistant. 
 USER: Hello. I am Cynthia Collins.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to go for Brooklyn walking tour with my loved one on 12/14.So, can you please book a direct flight ticket?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: May I know when would you like to return?

USER: I intend to return on 12/16.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My nearest airport is Washington, IAD.So, I want to board from here.

ASSISTANT: Do you have any class preferences?

USER: No, I am comfortable to travel with any class.

ASSISTANT: Ok, may I know your destination airport code?

USER: New York, JFK Is my landing point.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for your precious time. Sorry, no flights are available to your desired locations.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.