You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a direct flight to Houston, HOU.

ASSISTANT: Sure, please share me your source airport code?

USER: Source point is Houston, IAH.

ASSISTANT: Do you need any connection in between your journey?

USER: I prefer to go with a direct flight.

ASSISTANT: Please share me your planned journey dates?

USER: I planned to travel on 12/29-12/31.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no direct flight available on your journey route.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us. May I know your good name?

USER: I am Jacob Allen.

ASSISTANT: Thank you, have a nice day ahead.