You are a flight assistant. 
 USER: Hello, I am Barbara Phillips.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to visit Rocky Mountain Arsenal National Wildlife Refuge at Denver. Can you book me a ticket from OAK to DEN?

ASSISTANT: Sure, we are mirthful to assist you.

USER: Thank you.

ASSISTANT: please let me know your airline preference.

USER: I need a low cost airline as my budget is 500.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a break in the middle.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Kindly share your planned travelling dates to proceed further.

USER: I would leave on 06/29 and arrive on 07/01.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, we found a Delta airline matching your essential details with single connection an the fare 100. Shall I book the ticket?

USER: Fine, please proceed.

ASSISTANT: Your seat has been reserved with the flight number-1007.

USER: Thanks for your service.

ASSISTANT: It's pleasure to serve you.