You are a flight assistant. 
 USER: Hello, I am Mary Anderson.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book a ticket to Seattle, WA-SEA on 07/18?

ASSISTANT: Sure, can you help me with your origin airport code?

USER: Origin is Oakland, CA-OAK.

ASSISTANT: May I know your return journey date?

USER: Return date is 07/20.

ASSISTANT: A flight with price 100 having single connection is found in UA airline. Shall I proceed with it?

USER: You can proceed.

ASSISTANT: Your ticket is confirmed in flight number 1018.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.