You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Adams here.

ASSISTANT: How may I guide you today?

USER: I am looking for a flight ticket in a business class for my business trip. So can you book it?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My journey dates for travel would be from Jan 05 to Jan 07.

ASSISTANT: Can you please provide your source and destination codes?

USER: Yes, my airport codes for the journey are from BOS to CLT.

ASSISTANT: Do you have any specifications?

USER: I am looking for a single connecting flight.

ASSISTANT: I am sorry to say that there is no flight with your requested class.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.