You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: My name is Cynthia Walker, I want to book a flight from DTW to DCA to attend a meeting with client. Can you book a connecting flight for me?

ASSISTANT: Sure, May I know the travel dates?

USER: I will fly on Jan 17 and return on Jan 19.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Thank you for the information.

ASSISTANT: Thank you for availing us.