You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be a help for you?

USER: Catherine Green here. Reserve a flight ticket from EWR to AUS.

ASSISTANT: Ok, may I know your travelling dates please?

USER: My planned dates of journey are from 09/08 to 09/10.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: Ok, no problem. Thank you so much for your help.

ASSISTANT: Thank you for approaching us.