You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to schedule my trip from DCA to PHL, can you please reserve me a flight ticket?

ASSISTANT: Sure, could you please mention with your dates of journey?

USER: My dates of journey are from Mar 10th to Mar 12th.

ASSISTANT: May I know your name please for further process of booking?

USER: I am Virginia Green.

ASSISTANT: Do you have any other specifications please?

USER: Yes, I prefer an economy class ticket. I would prefer not to travel in low-cost airline. I want to depart in the evening. I want a break in between my journey.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry Green, there is no flight found as per your travelling details.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.