You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Raymond Young. Can you please make my reservation from LGA to AUS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, my trip dates are Dec 09 and Dec 11.

ASSISTANT: Sorry, there are no flights found in these dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.