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

ASSISTANT: Hello,. How can I amend you today?

USER: To visit the Outdoor Trivia race located in Dallas, I need to go there.

ASSISTANT: Ok.

USER: So, please book flight from Austin, AUS.

ASSISTANT: Sure, we are mirthful to aid you.

USER: Thank you.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: I Choose to travel on 03/05-03/07.

ASSISTANT: To proceed with your booking I need your destination airport code.

USER: It's Dallas. DFW is my landing point.

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

USER: Sure.

ASSISTANT: Thanks for your time. Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: Ok, Thanks for the quick response.

ASSISTANT: Thank you for availing us.