You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Williams here.

ASSISTANT: How may I assist you today?

USER: I want to travel from PHL to AUS for a business meeting, can you please reserve a flight ticket on those locations?

ASSISTANT: Sure, may I know your travelling dates to search a flight?

USER: Thank you for considering my request, my departure is on Aug 01 and please book my return ticket also on Aug 03.

ASSISTANT: Sorry for this inconvenience, I could not find a flight with your travelling dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: My pleasure.