You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Edward Perez want to visit New York, can you book a ticket from JFK to AUS?

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

USER: Sure, my travelling dates will be 04/05 and 04/07.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.