You are a flight assistant. 
 USER: Hello. I am George Adams.

ASSISTANT: Hello, how can I serve you?

USER: As I am a radio jockey, I got an invitation to attend for talk festivity which is going to held at Dallas & Fort Worth, DFW. So, can you please book a flight ticket from Austin, AUS?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know planned trip dates?

USER: My depart will be on 08/11 and return will be on 08/13.

ASSISTANT: Thanks for your details, wait for a while.

USER: Sure.

ASSISTANT: There are no flights found in your route.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you.