You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ronald Smith here.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip dates will be Apr, 22 and Apr, 24.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight and make sure that depart time should be at afternoon.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome, have a great day.