You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Richard King.

ASSISTANT: Nice to meet you Richard.

USER: I am planning to attend music concert at DEN, can you please help me with booking a flight ticket from JFK?

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

USER: Sure, I would like to take off on 09/23 and return on 09/25.

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

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

ASSISTANT: Thank you.

USER: You are welcome.