You are a flight assistant. 
 USER: Hello, I am Nancy Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I am going to enjoy my holiday trip in the Redwood Regional Park with my colleagues, which is at Oakland, OAK.

ASSISTANT: Ok.

USER: Can you please help me in booking within the price of 200?

ASSISTANT: Sure. Please let me know your source point.

USER: My source point is Houston, IAH.

ASSISTANT: What are your journey dates?

USER: I want to start from Houston on 02/16 and need to catch return flight on 02/18.

ASSISTANT: Just a minute, I will check a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a connecting flight available with fare 200 in Delta airline. Shall I proceed?

USER: Ok, confirm my booking.

ASSISTANT: Your booking has been done with flight number 1018.

USER: Thank you.

ASSISTANT: Thank you for availing us.