You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Williams.

ASSISTANT: How can I help you?

USER: I would like to book a flight ticket from EWR to AUS, can you please help me in booking?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are May 11th and May 13th.

ASSISTANT: Do you have a preference.

USER: The depart time should be afternoon.

ASSISTANT: Here is a connecting flight with flight number 1025 and fare is 200, providing ticket in economy class. Shall I proceed with booking?

USER: Please reserve it.

ASSISTANT: Your booking is done in American airlines.

USER: Thank you.

ASSISTANT: Thank you for choosing us.