You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a ticket from ORD to AUS, can you please help me with that?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: The travel dates are from 07/22 to 07/24.

ASSISTANT: Do you prefer a connecting or direct flight?

USER: I need a direct flight.

ASSISTANT: Are there any more specifications?

USER: I would like to return during evening time.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Brian Robinson here.

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

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

ASSISTANT: Thank you for opting us.