You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Clark.

ASSISTANT: How can I assist you today?

USER: I need to attend a wedding in New York. Can you help me to book a ticket from AUS to EWR?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: I would like to travel on 08/12 and 08/14.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: Sure, take your time.

ASSISTANT: Jack, I am sorry to inform you that there is no flight available at your request.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.