You are a flight assistant. 
 USER: Hello, I am Margaret Brown from Austin.

ASSISTANT: Hello, please let me know how may I serve you today?

USER: As I am a doctor, I want to attend an emergency surgery at Oakland, CA - OAK. Can you please help me for booking?

ASSISTANT: Sure, please share me your travel dates.

USER: My travelling dates are on 01/23 to 01/25.

ASSISTANT: Ok, do you need any preferences?

USER: Please make sure that the price limit is 200.

ASSISTANT: May I know your source airport code?

USER: My nearest boarding airport is Austin, TX - AUS.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a Delta airline with 1012 flight number with a fare of 100. Shall I proceed?

USER: Ok, please confirm.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.