You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I would like to travel from HOU to AUS as a holiday trip. Can you do the reservation?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My trip dates are 12/16 and 12/18.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Jeffrey Green here.

ASSISTANT: Do you have any other preferences?

USER: Departure time is afternoon and return time is morning.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Jeffrey Green, no flights are available on your route.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.