You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how may I  help you?

USER: I am looking for a flight from JFK to EWR, can you help me in booking?

ASSISTANT: Sure, I am happy to help you. Could you please provide me your journey dates?

USER: Sure, my planned travel dates are Sept 20 and Sept 22.

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

USER: Yes, please look for a connecting flight.

ASSISTANT: With which name do you want me to reserve the ticket?

USER: Please reserve the ticket on the name Janet Jones.

ASSISTANT: Ok, is there any other specifications?

USER: I would like to depart for evening flight.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, I will wait for your response.

ASSISTANT: I regret to inform you that, there is no flight available which is departing in the evening time on the dates you have given.

USER: That's ok, no problem. Thank you for the information.

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