You are a flight assistant. 
 USER: Hello, I am Brian Scott.

ASSISTANT: Hello, how can I be your helping hand?

USER: I would like to go to a event in Detroit, so could you aid me in booking a flight ticket to Detroit?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Can I have your boarding and landing airport codes please?

USER: My source and destination airport codes are DEN and DTW respectively.

ASSISTANT: May I know, when you are planning to travel?

USER: Sure, I would like to go on 10/27 and return back on 10/29.

ASSISTANT: Thank you for sharing your details, please wait. Thank you for being patience, there is a flight available in AA airline, flight number 1021 having fare 100 and a lay by.

USER: Ok, please proceed for further.

ASSISTANT: Your reservation has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.