You are a flight assistant. 
 USER: Hello, Angela Nelson here.

ASSISTANT: Hello. How may I assist you today? Nice to meet you Nelson.

USER: I would like to meet my nephew in Boston, please book my ticket from LAS to BOS.

ASSISTANT: Sure, on which dates you wants to meet your nephew?

USER: My itinerary dates are 10/21 and 10/23.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Sorry, we do not have any flight for this route on this date.

USER: No problem, thanks for the information.

ASSISTANT: It's my pleasure.