You are a flight assistant. 
 USER: Hello, Dennis Edwards here.

ASSISTANT: Hello, may I know your concern of approaching us?

USER: Actually, I am planning to meet my grandfather as he is unwell. Can you please help me to book my flight ticket from DTW to ORD?

ASSISTANT: Sure, I will help you with this. Do you have any class preference for this trip?

USER: No, it's an emergency. Any class is ok for me.

ASSISTANT: When you have planned your departure and arrival dates?

USER: I want to depart on Feb 21st and I will return back on Feb 23rd.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: JetBlue airlines is providing direct flight on service on this route with a ticket fare of 200, shall I book your ticket?

USER: That's good, you can book the ticket now.

ASSISTANT: Dennis Edwards, your ticket is booked in flight number 1006.

USER: Thank you very much for your help.

ASSISTANT: Thank you and have a safe journey.