You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Melissa King. I want to travel from ATL to PHX. Can you book a flight ticket for me?

ASSISTANT: Sure, I am glad to help you in booking. Kindly provide your travel dates to proceed further?

USER: I want to travel in the flight on 03/30 and 04/01.

ASSISTANT: Sorry for the inconvenience, there are no flights in this route as per your travelling details.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for approaching us.