You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I am Kimberly Hill, I need to book a flight ticket from PHL to AUS. Can you please help me with booking?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: Ok, my respective travel dates are from 09/23 to 09/25.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you that, there is no flight available in this route on the dates you have given.

USER: Not a big problem, anyway, thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.