You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jonathan Miller here.

ASSISTANT: How may I aid you today?

USER: Can you book a flight ticket for my airport codes that is from JFK to LAS?

ASSISTANT: Sure, I am here to help you with the ticket booking. May I know your planned trip dates?

USER: The travel dates are from 29 Feb to 02 Mar.

ASSISTANT: Ok, please tell me your class preference.

USER: That does not matter. I would like to depart in the evening time.

ASSISTANT: Ok, do you have any preference related to connection limit?

USER: I need a single connecting flight.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to intimate you that, there are no flights available in this route which is matching to your requirements.

USER: Ok, that is not a problem. Thank you.

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