You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Adams here.

ASSISTANT: How may I help you out?

USER: I would like to book a flight ticket from JFK to PHX for a business conference, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you. My depart is on 12/02 and please book my return ticket on 12/04.

ASSISTANT: Sorry, there are no flights found.

USER: Oh! Sad to hear that.

ASSISTANT: Thank you for choosing us.

USER: Anyway, thank you for the information.