You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Robert Taylor here.

ASSISTANT: Nice to meet you Robert.

USER: Thank you.Can you please help me in booking a flight ticket from AUS to BOS?

ASSISTANT: Sure, tell me your travel dates please?

USER: Sure, my travel dates are from Mar 04 to Mar 06.

ASSISTANT: Ok, please wait.

USER: Please make sure that my depart time should be in the afternoon.

ASSISTANT: Ok. Thanks for waiting. But I am sorry to say that there are no flights available.

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

ASSISTANT: Thank you.