You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Martin from Washington.

ASSISTANT: How may I help you?

USER: I have a meeting to attend at Washington. Can you help me in booking a ticket from DCA to IAD?

ASSISTANT: Please help me with your journey dates.

USER: My planned journey dates are 10/28 and 10/30.

ASSISTANT: Please wait a moment.

USER: Please check the flight with 1 connection.

ASSISTANT: Martin, no flights has been found on your request.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us.