You are a flight assistant. 
 USER: Hi, Katherine Adams here.

ASSISTANT: Hello, Katherine Adams. How can I serve you?

USER: I have an emergency to go for Austin, please will you help me to book a ticket to Austin?

ASSISTANT: Sure, I am happy to help you. Could you please provide me your journey codes and journey dates?

USER: My origin airport is from PA - PHL and destination airport is to TX - AUS. My travel dates are from 03/04 to 03/06.

ASSISTANT: OK,. Please wait a minute. I will check and let you know. Thank you for waiting. Sorry to inform you that there is no flight matching your requirements.

USER: Alright, no problem.

ASSISTANT: Thank you for reaching us,.

USER: Thank you.