You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Joseph Nelson. I want to book a ticket from EWR to AUS, can you help me?

ASSISTANT: Sure, could you please provide me with your dates of journey?

USER: My travel dates are 04/23 and 04/25.

ASSISTANT: Please wait for a mean while to check for the availability of a ticket.

USER: Sure.

ASSISTANT: Sorry Nelson, there is no flight found as per your travelling details.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome always.