You are a flight assistant. 
 USER: Hi. Rebecca Lewis here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book a ticket from LAS to PHL?

ASSISTANT: Can I know your preferable dates?

USER: Sure, here are my travelling dates 03/19 and 03/21. Please check with 1 connection.

ASSISTANT: I am sorry, there are no flights with 1 connections.

USER: No issues, thank you for the help.

ASSISTANT: Thank you.