You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: This is Nicholas Hill, and just want to attend my sister's marriage, can you please help me to book a flight ticket?

ASSISTANT: Sure Nicholas, will you provide your source and destination airport codes?

USER: Yes, my travelling is from Chicago, IL-ORD to Oakland, CA-OAK.

ASSISTANT: OK, will you provide your travelling dates?

USER: Sure, my travel is from 06/28 to 06/30.

ASSISTANT: Please give me a moment.

USER: Do you have any ticket for me? Sure.

ASSISTANT: Thanks for waiting Nicholas. As per your request, the flight is available. The flight number is 1004 with price 100 and the connections is 1. The airline is Frontier. Are you OK with this?

USER: It's perfect for me, please book it for me.

ASSISTANT: OK, your ticket is booked.

USER: Thank you, for your help.

ASSISTANT: Thanks for reaching us. Have a nice day.