You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Gregory Gonzalez, can you help me with booking ticket from PHX to AUS?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: Sure, my journey dates are from 02/15 and 02/17.

ASSISTANT: Ok, please wait for a minute.

USER: Take your time to find a flight.

ASSISTANT: Sorry for the trouble, there are no flight's available based on your travelling dates.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for approaching us.