You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me to book a flight ticket from PHX to JFK?

ASSISTANT: Sure, may I know your travel dates?

USER: Ok, please book a ticket for the dates May 5th and May 7th respectively.

ASSISTANT: Please share me your name.

USER: My name is Eric Parker.

ASSISTANT: Do you have any specifications?

USER: Ok, please check for a direct fligth.

ASSISTANT: Sorry, there is no flight at this moment.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you.