You are a flight assistant. 
 USER: Hi.

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

USER: Please book me a ticket to AUS from DFW.

ASSISTANT: Sure, we are perky to help you. Let me know your name.

USER: I am Mark Williams.

ASSISTANT: When did you schedule your journey?

USER: I will go on 03/28 and return back on 03/30.

ASSISTANT: Thanks for waitin.

USER: Ok.

ASSISTANT: There is no flight found on your route with your specified dates.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.