You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Myself Donald Thompson. Can you please help me in booking a flight ticket from PHX to JFK locations?

ASSISTANT: Sure, may I know your departure and arrival day?

USER: My travelling dates are from 03/23 and 03/25.

ASSISTANT: Sorry, there is no plane as per your requested travelling dates.

USER: It's ok. Thank you for the information.

ASSISTANT: My pleasure, have a great day.