You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket to attend an event which is going to held at MA. Can you help me?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure, Mar 19th and 21st are my travelling dates.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Can I know your nearest airport codes?

USER: DFW and BOS are my airport codes.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No issue, Thank you for the information.

ASSISTANT: Can I know your name?

USER: Shirley Mitchell here.

ASSISTANT: Thank you for reaching us.