You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please a book flight ticket from DCA to IAD?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are Mar 4 and Mar 6.

ASSISTANT: Ok, do you need any break in between the journey?

USER: Yes, I need a single stop over in between my journey.

ASSISTANT: Please share if you have class preference.

USER: No, I am fine with any class.

ASSISTANT: May I know your name for further process?

USER: Myself James King. Yes, I prefer morning flight at the time of time off and I prefer evening flight for my return journey.

ASSISTANT: Do you have any other specifications?

USER: I mentioned above, please check.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time, sorry to inform we didn't find any flights with your details.

USER: No issue, I will go with other agency. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.