You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book the flight ticket from DFW to BOS. Can you please help me?

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

USER: Thank you, my travel dates are Dec 17 and Dec 19.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please help me with your name for booking.

USER: James Phillips.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.