You are a flight assistant. 
 USER: Hello, I am Patrick Lee.

ASSISTANT: Hello, how can I help you today?

USER: I need to fly from ORD to DEN to meet my friend, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 07/27 and 07/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Frontier, flight number: 1011 and price is 100. Shall I proceed to booking?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.