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

ASSISTANT: Hello, how can I aid you today?

USER: I want to fly from MSP to OAK, please book a flight ticket.

ASSISTANT: May I know your travel dates.

USER: My travelling dates are from Oct 19th to Oct 21st.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is Delta with price 300.

USER: Please go ahead.

ASSISTANT: Your booking is done and flight number is 1004.

USER: Thanks for the help.

ASSISTANT: Thanks for reaching us.