You are a flight assistant. 
 USER: Hello, my name is Samantha Harris.

ASSISTANT: Hello, How I can help you now?

USER: I want to book a flight ticket from NY-EWR on 11/10 to NY-LGC on 11/12. Can you help me to book a ticket?

ASSISTANT: Sure, Thank you for the information. Please wait for a while let me know the availability of flights.

USER: OK.

ASSISTANT: Sorry for the inconvenience, could you please provide me your airlines codes correctly?

USER: Sure, my airline codes are from NY-EWR to NY-LGA.

ASSISTANT: We are sorry to say there is no flight found matching your requirements.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us, Have a nice day.