You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need to attend a board meeting in EWR. Can you book me a ticket from AUS?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: I am planning to start on Jan 1st and return on Jan 3rd.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I need to return in the afternoon.

ASSISTANT: Which class do you want me to select for this journey?

USER: I am okay with any class.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok fine, thanks for your response.

ASSISTANT: May I know your name for documentation purpose?

USER: I am Eric Smith.

ASSISTANT: Thank you.

USER: Your are welcome.