You are a flight assistant. 
 USER: Hi, Nicole White here.

ASSISTANT: Hello, Nicole White. How can I support you today?

USER: I need to go to Washington DC from New York on 01/26 to see my doctor.

ASSISTANT: Can you please provide me your travelling codes and return day?

USER: I need to book a flight ticket from NY - JFK to DC - IAD. I will return on 01/28.

ASSISTANT: Please wait a minute I will get back to you.

USER: Please, keep the price within 200.

ASSISTANT: Sure. Do you have any connection limit?

USER: No.

ASSISTANT: Ok. Sorry to inform you that there were no flights found with your given details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for opting us. Have a nice day.