You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Pamela Lewis panning to visit Desert Botanical Garden at Phoenix on 09/15 and intend to return on 09/17. Can you help me to book a flight ticket?

ASSISTANT: Sure, May I know your respective airports codes please?

USER: Sure, I want to fly from MSP to PHX.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Pamela, there is no flight found as per your travelling details to reserve a ticket.

USER: That's ok, thank you.

ASSISTANT: You are welcome.