You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Please help me to book a flight ticket from CLT to PHL.

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are from Apr, 19 to Apr, 21.

ASSISTANT: May I know your name to proceed further?

USER: I am Larry Williams.

ASSISTANT: Do you have connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Here is a connecting  flight in Delta airlines, can I proceed with it?

USER: If it a business class and the return in the morning, then please proceed.

ASSISTANT: Sorry Larry Williams, there is no flight in your route as per your requirement.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.