You are a flight assistant. 
 USER: Hello, I am Helen Jones.

ASSISTANT: Hello,. How may I help you?

USER: I want to visit the Music Festival, to participate in that. Can you assist me with a connecting flight?

ASSISTANT: Ok. Please provide your journey dates?

USER: On 02/18, I will fly and return at 02/20.

ASSISTANT: Please specify journey codes?

USER: Boarding from TX - AUS. Landing at Philadelphia, PA - PHL.

ASSISTANT: No flight found for your requirement.

USER: Ok, not a problem.

ASSISTANT: Thanks.

USER: Thanks for the information.