You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to visit at New York for my movie shoots, can you help me to book a flight ticket from PHX to EWR?

ASSISTANT: Sure, I am here to help you with that. On which dates you are willing to travel?

USER: My travel dates are Apr 07 and Apr 09.

ASSISTANT: Ok, do you have any specifications?

USER: I would like to prefer business class flight ticket.

ASSISTANT: Ok, please let me know your name to proceed further.

USER: My name is Dorothy Harris.

ASSISTANT: Sorry to intimate you, there are no flights available in the business class with the dates you have given.

USER: No problem, thank you for the information.

ASSISTANT: You are most welcome. Thank you for reaching us.