You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am John Martin here, I want to reserve my ticket which is direct for me to travel, can you please help me in this?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my respective dates of journey is from 05/09 to 05/11.

ASSISTANT: May I know your airport codes?

USER: Sure, my respective airports codes are from AUS to IAD.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flight is available for you on that dates.

USER: Ok, not an issue. I will try with the another travelling agency.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Anyways, thank you for your service.