You are a flight assistant. 
 USER: Hello. I am Debra Robinson.

ASSISTANT: Hello, How can I assist you?

USER: I need to fly New York, could you please help me in booking my flight ticket from OAK to EWR?

ASSISTANT: Sure, May I know the travel dates?

USER: My planned trip dates are 01/27 and 01/29.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us.