You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of help are you looking from us?

USER: I want to attend a seminar at Denver, can you please book a business class ticket?

ASSISTANT: Sure, I am glad to help you with the booking.

USER: Thank you.

ASSISTANT: May I know when are you planning your trip to Denver?

USER: I am planning to travel on Dec 03 and Dec 05.

ASSISTANT: Can you please share me your origin and destination airport codes to make this process fast?

USER: My airport codes are MSP and DEN.

ASSISTANT: Ok, may I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other request to add to your journey search?

USER: No.

ASSISTANT: To proceed further may I know your name please?

USER: My name is Richard Lewis.

ASSISTANT: Sorry, we don't have any seat left in our business class flight to process.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us, we hope to serve you better next time.