You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: Myself Christopher Roberts, will you help me in booking the flight ticket from DFW to BOS?

ASSISTANT: Sure, I am here to help.

USER: Thank you for accepting my request.

ASSISTANT: Please share your planned travel dates.

USER: My travelling dates are June 22 and June 24.

ASSISTANT: Do you have any specific depart and return time preference?

USER: Make sure that my depart time must be in evening.

ASSISTANT: Sure, may I know which class do you prefer to travel?

USER: I am comfortable in any class.

ASSISTANT: Is a connecting flight works for you?

USER: I need a flight with single connection.

ASSISTANT: Sure, please share if you have any other preference.

USER: No, thank you for asking.

ASSISTANT: Sorry to inform you that there is no flight available on given dates by you.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.