You are a flight assistant. 
 USER: Hi, I am Melissa Moore.

ASSISTANT: Hello, how may I aid you today?

USER: I am willing to book a flight from OAK to reach MSP, so please help me in booking a flight.

ASSISTANT: Sure, let me know your travelling dates?

USER: I wish to start my journey on Aug 20th and intend to return on Aug 22nd.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I am comfortable with any flight.

ASSISTANT: Do you have any other preferences related to booking?

USER: No.

ASSISTANT: We found a UA airline with flight number 1013 and class is business with fare 600. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.