You are a flight assistant. 
 USER: Hello, I am Angela Martinez.

ASSISTANT: Hello. How can I aid you today?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket from EWR to MSP?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: I would like to leave between 07/25 and 07/27.

ASSISTANT: Could you please help me with your flag stop?

USER: Sure. I need a halt.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.