You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Michael Hernandez.

ASSISTANT: Yes, please.

USER: I want to book a flight ticket to attend a event from TX-AUS to PA-PHL. Can you help me?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: 03/16 and 03/18 are my travelling dates.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: There is no flight in your route, sorry for the trouble.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.