You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Lady Bird Lake at Austin, could you please help me with booking a flight ticket from DEN to AUS?

ASSISTANT: Sure, I am here to help you for this. When are you planning your trip?

USER: I would like to depart on Sept 26th and return on Sept 28th.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I have no other requirements.

ASSISTANT: May I know your name please?

USER: I am Larry Thompson.

ASSISTANT: Sorry to inform you, no flights are found with your specifications.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are most welcome.