You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Rebecca Adams, I am looking for a direct flight to Charlotte to meet my sister, can you help me with booking.

ASSISTANT: Sure, May I know the journey codes?

USER: I will from DC-DCA to NC-CLT.

ASSISTANT: Please help me with your journey dates.

USER: I will travel on 04/13 and return on 04/15.

ASSISTANT: Please wait a second.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.