You are a flight assistant. 
 USER: Hi. I am Samantha Phillips.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket to participate in  a scuba diving event at MA-BOS from NV-LAS. Can you help me?

ASSISTANT: Sure, Please help me with your travel dates.

USER: 09/06 and 09/08 are my travelling dates.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issue. Thank you .

ASSISTANT: Thank you for reaching us.