You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How shall I help you?

USER: I am Joseph Walker, planning a direct flight from Austin.

ASSISTANT: Ok.

USER: Can you reserve a seat from AUS to DEN?

ASSISTANT: Sure. Please let me know your dates of travel.

USER: I am willing to travel on 07/03 to 07/05. Price limit with in the 5000.

ASSISTANT: I'm sorry, no direct flight is available from AUS to DEN.

USER: Ok. Thanks for helping me with your information.

ASSISTANT: Thanks.