You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am Dorothy Hall want to attend a seminar in Southwestern University in Austin, can you help me to book a direct flight?

ASSISTANT: Sure, may I know your journey dates?

USER: Yes, my travel dates are 04/27 and 04/29.

ASSISTANT: Can you please provide your source and destination?

USER: Sure, I would like to travel from DEN to AUS.

ASSISTANT: Thank you for providing your details, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to say that no flights was found with your given details.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you, for connecting with us.