You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I amend you today?

USER: I am Matthew Clark. I need to book a flight ticket to Austin to participate in the baseball tournament. Can you please help me in booking?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are from PA-PHL to TX-AUS.

ASSISTANT: When do you planned your journey dates?

USER: I have to travel on 01/04 and return on 01/06.

ASSISTANT: Do you need any other specifications?

USER: I need a halt.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting but unfortunately there is no flight found on your requested dates.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us, wish you a great day.

USER: Thank you.