You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Rebecca Scott here. Can you book me a ticket from PHX to EWR?

ASSISTANT: Can I know your preferable dates?

USER: Sure, here are my travel dates 03/15 and 03/17.

ASSISTANT: I am sorry, there are no flights available.

USER: No issues, thank you for the information.

ASSISTANT: Thank you, have a good day.