You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Gonzalez.

ASSISTANT: Margaret, how may I help you?

USER: Can you help me in booking on 12/13 to 12/15?

ASSISTANT: Please share your airport codes.

USER: I will fly from AUS to LAX. I need a direct flight.

ASSISTANT: Please give me a moment to check for available flights.

USER: Ok.

ASSISTANT: Sorry, no direct flight is available.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.