You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My name is Stephen King want to attend a seminar in Phoenix, can you book a ticket on dates 12/21 and 12/23?

ASSISTANT: Sure, can you please provide your airport codes?

USER: Yes, I would like to have my journey from MSP to PHX.

ASSISTANT: Ok, I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there were no flights found matching with your criteria.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for approaching us.