You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: I need a ticket from Phoenix, AZ-PHX to Huston, TX-HOU.

ASSISTANT: Ok, may I know your journey dates please?

USER: Journey dates are from 12/12 to 12/14.

ASSISTANT: Can I have your good name please?

USER: I'm Brenda Hall.

ASSISTANT: Frontier airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Please book direct flight.

ASSISTANT: Sorry to inform you that there are no direct flights available on those dates.

USER: Thank you.

ASSISTANT: Thank you for choosing us.