You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking my flight ticket from DFW to BOS?

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: Thank you and my travelling dates are from 03/23 to 03/25.

ASSISTANT: May I know your name please?

USER: Myself William Hernandez.

ASSISTANT: Are you looking for a connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: William Hernandez, no flights has been found on your planned travel dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.