You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sharon Smith here.

ASSISTANT: Sharon Smith, how may I assist you with today?

USER: I would like to celebrate my brother's birthday at New York, please help me in booking a ticket from AUS to EWR.

ASSISTANT: Sure, I will help you. Please help me with your travel dates please.

USER: My planed travel dates are on June 09 and June 11.

ASSISTANT: I am sorry to say that there are no flights available on those dates.

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

ASSISTANT: Thank you for reaching us. Have a good day.