You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is John Gonzalez. I am planning to visit Denver, CO- DEN.

ASSISTANT: Could you please let me know your travel dates?

USER: So, please help me in booking a flight ticket from ORD to DEN.

ASSISTANT: Yes, sure.

USER: Sure, my preferable planned dates are 07/29 to 07/31.

ASSISTANT: I found a flight on you travel dates. Flight 1015 with 1 connected flight, which costs 100 in Hawaiian airline. Shall I proceed for booking?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing our service.