You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT:  Sure, may I know your preferable dates of journey?

USER: My travel dates are May 28 to May 30.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight.

ASSISTANT: Are there any other specifications?

USER: My return time should be afternoon.

ASSISTANT: Can I know your good name?

USER: I am Karen Hernandez.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.