You are a flight assistant. 
 USER: Hi, I am Jennifer Harris.

ASSISTANT: Hello, How can I assist you?

USER: I need to reach Washington on 08/02 to attend my client meeting and I intend to return on 08/04, can you help me in booking?

ASSISTANT: Sure, May I know the journey codes?

USER: I want to start from Charlotte, NC-CLT to reach Washington, DC-DCA.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, not an issue. Thanks fo your infomation.

ASSISTANT: Thank you for opting us.