You are a flight assistant. 
 USER: Hi, I am Rebecca Perez.

ASSISTANT: Hello. How may I help you?

USER: I am willing to book a flight from AUS to reach Oakland, will you please help me in booking a flight?

ASSISTANT: Sure, tell me your travel dates please?

USER: My planned dates are on Sept 20th to 22nd.

ASSISTANT: May I know your departure and return time please?

USER: My depart time is afternoon and the return time is evening.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry there no flights available in the afternoon time.

USER: Not an issue, thank you.

ASSISTANT: Thank you.