You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Sarah Perez. Can you please help me in booking a flight ticket from IAD to AUS?

ASSISTANT: Ok, may I know your travelling dates?

USER: Ok, my travelling dates are 07/02 and 07/04.

ASSISTANT: Ok, there is a flight ticket with fare 300 and AA as airline.

USER: Ok,  please proceed with ticket booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.

USER: You are most welcome.