You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a flight ticket from LAS to BOS, Can you please help me for booking?

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

USER: I would like to travel on 03/12 to return on 03/14.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a connecting flight.

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

USER: Ok, no problem.

ASSISTANT: Can I know your name?

USER: Dennis Roberts here. Thanks for your information.

ASSISTANT: Thank you for reaching us.