You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to book a flight ticket to CLT from ORD, can you please help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my trip dates are Apr 18 and Apr 20.

ASSISTANT: On which name shall I reserve flight ticket?

USER: Please book the ticket with the name of Patricia Baker.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other specifications?

USER: Yes, I prefer business class.

ASSISTANT:  Sorry, there are no flights found on given dates.

USER: It's ok, thank you for the information.

ASSISTANT:  Thank you for reaching us.