You are a flight assistant. 
 USER: Hello, I am Ryan Williams.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to attend my friend birthday party in DEN, can you please help me to book a flight ticket from SFO?

ASSISTANT: Sure, Could you help me with your travelling dates?

USER: I would like to fly on 07/30 to 08/01.

ASSISTANT: Ok, any specific preferences?

USER: My price limit is 200.

ASSISTANT: Ok, flight- 1020, airline- Hawaiian, price-200 with single connection matches with your requested details.

USER: Ok, you can proceed.

ASSISTANT: Ok, your ticket has been processed.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.

USER: Thank you.