You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please book a flight ticket from PHX to CLT?

ASSISTANT: Sure, may I know your dates of travel?

USER: My travelling dates are Dec 14 and Dec 16.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon.

ASSISTANT: May I know your name?

USER: My name is Edward Harris.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.