You are a flight assistant. 
 USER: Hello, I am Ruth Nelson.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to conduct a science fair in my college at Boston, MA-BOS. Could you please help me reserving a plane ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I want to fly on 10/23 and return on 10/25.

ASSISTANT: Please provide your origin airport code.

USER: Sure, Washington, DC-DCA is my source airport code.

ASSISTANT: Do you have any other specifications?

USER: I need a halt in between the journey.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: No problem, I will choose another way to reach my destination. Thank you for the information.

ASSISTANT: Thank you for choosing us.