You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Nancy Jackson, I want to book a flight to Chicago to visit Navy Pier to meet my friend. Can you book a flight from CA-OAK?

ASSISTANT: Sure, please share me your travelling dates?

USER: I will travel on 06/17 and return on 06/19.

ASSISTANT: Do you have any specifications?

USER: I need a flight under fare of 500. I need a flight with single connection.

ASSISTANT: Kindly mention me your source code?

USER: My destination point is IL-ORD.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found 1003 Delta airline with single connection and price of 100. Shall I proceed with booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.