You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Frank Hall.

ASSISTANT: How may I lend a hand to?

USER: Can you help me to book a flight from OAK to AUS?

ASSISTANT: Can you please mention your travel daes?

USER: I will fly on 1st Dec and return on 3rd Dec.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. My budget is 200 for flight ticket.

ASSISTANT: Frank Hall sorry to inform, no flights are found with your criteria.

USER: Ok, thank you for the information.

ASSISTANT: Thank you very much for utilising our agency.