You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book a flight ticket from PHX to HOU?

ASSISTANT: Sure, can you share me your trip dates?

USER: My trip dates are June 16 and June 18 respectively.

ASSISTANT: Do you have any connection limit?

USER: I prefer for connection limit preferences.

ASSISTANT: Are there any other specifications?

USER: I prefer to travel in economy class flight.

ASSISTANT: May I know your good name?

USER: Ruth Harris here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.