You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Baker.

ASSISTANT: How may I support you today?

USER: I want to book a flight ticket from NV-LAS to MA-BOS. Can you help me?

ASSISTANT: Sure, we are here to help you in booking.

USER: Thank you.

ASSISTANT: Please let me know if you need a connecting flight.

USER: I need a connecting flight.

ASSISTANT: May I know your planned travelling dates to proceed further?

USER: 11/15 and 11/17 are my travelling dates.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: No issue, Thank you.

ASSISTANT: Thank you for availing us.