You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Nicole King, I want to book a flight on 11/20 to attend a meeting. Can you help me to book a connecting flight?

ASSISTANT: Sure, I will help you. Please share me your airport codes?

USER: I will fly from TX-AUS to PA-PHL.

ASSISTANT: When your willing to return.

USER: I will return on 11/22.

ASSISTANT: OK, please wait for a while I will check and inform you.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry to inform you there are no flights with your specifications.

USER: Thank you for the information.

ASSISTANT: Thanks for reaching us.