You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Campbell.

ASSISTANT: How may I serve you?

USER: I have to visit a New York city JFK to meet my grandfather from PHX. Can you find a flight ticket for me?

ASSISTANT: Sure, I am happy to help you with the ticket booking. Please tell me your planned travel dates.

USER: Thank you. my planned trip dates are on May 02 and return on May 04.

ASSISTANT: Ok, do you have any class preference to travel?

USER: No but I need a flight which is returning in the evening time.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight found in this route which is returning in the evening time.

USER: That's fine, no problem. Thank you for your information.

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