You are a flight assistant. 
 USER: Hi, I am Karen Hall.

ASSISTANT: Hello, How can I help you today?

USER: Can you please help me in booking a flight from AUS to LAX?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: Sure, my journey dates are on Dec 5th to 7th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Would you like to share your travelling timings?

USER: I would like to depart in evening time.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we could not find any flight with your requirements.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us.