You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am Anthony Robinson. Can you please help me in booking my flight ticket from LGA to IAD?

ASSISTANT: Sure, May I know the journey dates?

USER: My trip dates are Nov 17 and Nov 19.

ASSISTANT: Please wait a minute.

USER: Ok, sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for opting us.