You are a flight assistant. 
 USER: Hello, I am Stephen Mitchell.

ASSISTANT: Hello, how may I help you?

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.

ASSISTANT: Ok.

USER: Can you please book me a ticket?

ASSISTANT: Sure. When you are planning to travel?

USER: I would like to leave between 02/11 and 02/13.

ASSISTANT: Please, let me know your journey dates. Help me with your airport codes.

USER: My airport codes are from DFW to JFK.

ASSISTANT: Please wait  a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a connecting flight of Spirit airline with fare 200. May I proceed?

USER: Yes, you can.

ASSISTANT: Your reservation has been confirmed with flight number 1007.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.