You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from PHX to HOU.

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

USER: June, 23 and June, 25 are my travel dates.

ASSISTANT: May I know your connection limit?

USER: I would prefer to single connection.

ASSISTANT: Is there any class preference for you?

USER: No, thanks.

ASSISTANT: Do you have any other specifications?

USER: No, thanks.

ASSISTANT: Your good name please.

USER: Rebecca Walker here.

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

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

ASSISTANT: Thank you for reaching us.