You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a connecting flight ticket to attend an client meeting at IL. Can you help me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Thank you. 09/27 and 09/29 are my travelling dates.

ASSISTANT: Can you please share your airport codes?

USER: LGA and ORD are my airport codes.

ASSISTANT: Is there any class preference?

USER: I need  a business class flight.

ASSISTANT: May I know your name please?

USER: Sure, Myself Angela Parker.

ASSISTANT: Do you have any other specification?

USER: No.

ASSISTANT: Angela Parker, there are no flights available in your route.

USER: No issue. Thank you .

ASSISTANT: Thank you for reaching us.