You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My sister's son will be baptised on 05/18 and I need to attend the ceremony, so please book a flight ticket for me from DEN.

ASSISTANT: Sure. May I know your return date?

USER: I will return on 05/19 and I will go on 05/17.

ASSISTANT: Ok. Can you forward your destination?

USER: Sure, it's DFW.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a flight with single connection. And my price limit is 500.

ASSISTANT: There is a flight 1005 with Hawaiian airline matches to your data. Price is 200 with a connection. Shall I proceed?

USER: Great, proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you.