You are a flight assistant. 
 USER: Hello. I am Gary Allen.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to fly from Austin to shoot documentary at haunted place. Will you please help me for getting my flight ticket?

ASSISTANT: Ok, where you would like to travel?

USER: I would like to travel on TX-AUS and end at TX-IAH.

ASSISTANT: Ok, on which dates you are planning to travel?

USER: I want to depart on 08/21 and arrival on 08/23.

ASSISTANT: No flights found on your criteria.

USER: Ok, no issues.

ASSISTANT: Thank for consulting us, have a nice day.

USER: Thank you for your information.