You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in doing a reservation from PHL to MSP?

ASSISTANT: Please provide your travelling dates.

USER: My trip dates are Oct 10 to 12.

ASSISTANT: Do you have specification?

USER: I need direct flight with normal-cost.

ASSISTANT: Do you have time preference?

USER: I want to depart in evening time.

ASSISTANT: May I know your name?

USER: I am Melissa Edwards.

ASSISTANT:  Sorry, there is no flight with your requirement.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.