You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

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

USER: My planned travel dates are June 24th and June 26th.

ASSISTANT: May I know your connection limit?

USER: Yes, I prefer to travel in single connection.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: The depart time should be afternoon.

ASSISTANT: Your good name please.

USER: Michelle Edwards.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.