You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me in booking a flight ticket from PHX to HOU.

ASSISTANT: Can I have your trip dates?

USER: Mar, 19 and Mar, 21 are my travel dates.

ASSISTANT: Do you need any connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know you name for booking purpose?

USER: Jacob White here.

ASSISTANT: There are no flights available on your routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.