You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my ticket from SEA to JFK?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, my planned dates of journey are from Oct, 22 to Oct, 24.

ASSISTANT: Do you have any other requirements?

USER: Yes, I want to depart at evening time.

ASSISTANT: Can I know your name please?

USER: Sure, my name is Larry Turner.

ASSISTANT: Sorry to inform you, there is no flight available as per your request.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Most welcome.