You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to book my ticket from Boston. Could you please help me with booking a flight ticket from BOS  to AUS?

ASSISTANT: Sure, can you please share your journey dates?

USER: I want to start my journey on Apr 27 to Apr 29.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a connecting flight in my journey.

ASSISTANT: Do you have any other specifications to be met?

USER: I need to book my ticket in economy class and the return time should be in the morning only.

ASSISTANT: Can I have your name to proceed further?

USER: Sure, myself Sarah Lewis.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.