You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Eric Nelson.

ASSISTANT: How may I assist you Eric?

USER: I was planning to visit my toy factory in Austin AUS, can you help me to find a flight on my route?

ASSISTANT: Sure, I will find a best flight for you.

USER: Thank you.

ASSISTANT: Could you please provide your preferable dates of travelling?

USER: I will be starting on 12/27 and I want to return on 12/29.

ASSISTANT: Ok, may I know your origin airport code to proceed further?

USER: My source airport is PHL.

ASSISTANT: Please wait a moment to check the availability of flights and I will revert back to you.

USER: Ok, I would prefer any direct flight for my journey.

ASSISTANT: Ok, I will search for it, please hold on.

USER: Sure, take your time and let me know the available flight details.

ASSISTANT: Sorry to inform you that, there are no direct flights available in your travelling locations with your requested dates of travelling.

USER: Oh! I would have booked my tickets in advance. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.

USER: You are welcome.