You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I am Michael Phillips. I want to book a flight ticket to attend a board meeting at CA-SFO on 12/03. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your return date please?

USER: Sure, 12/05 will be my return date.

ASSISTANT: Ok, please help me with your source code for further process.

USER: NV-LAS will be my nearest airport code.

ASSISTANT: Give me a minute please I will get back to you.

USER: Ok.

ASSISTANT: Thanks for your time, we found a direct flight is that comfortable for you?

USER: Yes you can proceed with it. Can I know the flight details?

ASSISTANT: Sure, flight number 1004 and airline Frontier at a price of 100.

USER: Thank you for helping me in reserving the flight ticket.

ASSISTANT: Your ticket has been reserved. Thank you for choosing us, have a nice day.

USER: Thank you.