You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to book a ticket from BOS to ORD. Can you please help me out?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to travel on Aug 22 and return back on Aug 24.

ASSISTANT: Please help me with your name for booking.

USER: My name is Carolyn Lopez.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a business class flight in my journey.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.