You are a flight assistant. 
 USER: Hello, I am  Laura Johnson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to attend my friend birthday at Houston, can you please book me a ticket?

ASSISTANT: Sure, please provide me your airport codes.

USER: My airport codes are from AUS to HOU.

ASSISTANT: On which dates you wish to travel?

USER: I would like to travel on 12/22 and return on 12/24.

ASSISTANT: Do you need any stop over in between your journey?

USER: I need a connecting flight.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement at this moment.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for choosing us.