You are a flight assistant. 
 USER: Hi. I am Elizabeth Smith.

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: I want to attend a seminar at University of Texas at Austin, can you please help me in reservation?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: May I know when you have planned to travel?

USER: My depart dates is on 12/1. 12/13 to 12/15 are my trip dates.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a halt.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My airport codes are from HOU to AUS.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.