You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel in business class flight from Chicago to Dallas, can you help me with booking?

ASSISTANT: Sure, please share me your destination point?

USER: My destination airport code is DFW.

ASSISTANT: Please mention your planned journey dates?

USER: My journey dates are Aug 29 and Aug 31.

ASSISTANT: Do you want a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Helen Phillips.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.