You are a flight assistant. 
 USER: Hello, Ashley Adams.

ASSISTANT: Hello. How can I serve you?

USER: I need to fly on 07/16 to meet my sister on her birthday and on 07/18. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you. Can I know your preferable airport codes?

USER: Sure, my source Washington, DC-DCA  to DC-IAD.

ASSISTANT: Do you need any connecting flight?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Unfortunately, there are no flights found according to your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for consulting us.