You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Frank Lewis here. I am planning to attend for my college feast, so can you please help me in searching my flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your source?

USER: My source code is AUS.

ASSISTANT: Can I know your destination airport?

USER: I want to go for Detroit,MI-DTW.

ASSISTANT: When your are planning to start your journey?

USER: I want to start my journey on 07/03 date.

ASSISTANT: Do you want return ticket?

USER: Yes, I want return ticket on 07/05.

ASSISTANT: I have found a flight-1009 of AA airlines travelling towards your destination. Shall I proceed?

USER: Ok, I am happy to fly in this flight.Please proceed.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Ok, thank you for your help.

ASSISTANT: Welcome.