You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I abet you?

USER: I am Jessica Lee. I would like to have a Luncheon with my clients in the Lancaster Hotel at Houston, so can you book a flight ticket on 11/15?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Can you please let me know your airport codes?

USER: CO-DEN and TX-HOU are my journey airport codes.

ASSISTANT: When do you want to return?

USER: I would like to return on 11/17.

ASSISTANT: Do you have any specifications?

USER: I need a stopover in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights available with a halt.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for selecting us.