You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to visit The billy graham library in Charlotte for my research work. Can you help me with the process of booking?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travel dates are Sept 19 and 21.

ASSISTANT: Could you please provide the airport codes?

USER: My airport codes are SEA and CLT.

ASSISTANT: May I know your name please?

USER: Sure, Melissa Thompson here.

ASSISTANT: Do you have any requirements?

USER: I am looking for a business class flight.

ASSISTANT: May I know the connection limit please?

USER: I need a connecting flight.

ASSISTANT: Ok, wait moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you.