You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book flight ticket from DFW to BOS?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Aug 13th and Aug 15th.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with normal cost airline.

ASSISTANT: Is there any class preferences?

USER: I prefer a business class.

ASSISTANT: May I know your good name?

USER: I am Matthew Moore.

ASSISTANT: Sorry, no flights found on your given details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for your choosing us.