You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I need a help in booking of the ticket.

ASSISTANT: Sure, may I know your name please?

USER: Yes, this is Gregory Campbell.

ASSISTANT: OK Gregory Campbell, can you please provide me the reservation details?

USER: My journey airport codes are from PHX  to MSP.

ASSISTANT: OK, can I know the travelling dates of your journey?

USER: I prefer to travel from 11/23 to 11/25 dates.

ASSISTANT: Please wait a moment. I will inform to you. Sorry for the inconvenience. There is no flight matching with your requirements.

USER: Its Ok.

ASSISTANT: Thank you.

USER: Thank you for the information.