You are a flight assistant. 
 USER: Hello, I am Charles Lee.

ASSISTANT: Hello, Charles. What can I do to make your experience better with us?

USER: I want to go for shopping at Pioneer Plaza in Dallas. Can you book me a ticket on dates from 04/30 to 05/02?

ASSISTANT: Sure, I am here to help you. Do you need any halt between your journey?

USER: No, I need a direct flight.

ASSISTANT: Ok, may I know your airport codes?

USER: My boarding is at CA - OAK and landing is at TX - DFW.

ASSISTANT: Charles, please wait a while.

USER: Ok.

ASSISTANT: Charles, I am happy to say that there is a flight at your request from Frontier airline with flight number 1015. Shall I proceed?

USER: That's Perfect. Please proceed.

ASSISTANT: Successfully your booking is done and it costs you only 100.

USER: Thanks for your support.

ASSISTANT: You are welcome. Thank you for opting us.