You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am planning to book a ticket from LGA to AUS. Can you please help me out?

ASSISTANT: Sure, could I have your journey dates?

USER: I am planning to to travel on Mar 16 and return back on Mar 18.

ASSISTANT: Do you have any class preference?

USER: Yes, I am looking for a business class.

ASSISTANT: May I know your good name?

USER: I am Amy Carter.

ASSISTANT: Is there any other specifications?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.