You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket from DFW to attend my niece baby shoewer in BOS.

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Sure, I need to depart on 08/26 and my return date will be on 08/28.

ASSISTANT: Ok, may I know your name?

USER: I am Patrick Hill.

ASSISTANT: As per your planning dates, no flights are available on your route.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.