You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at this moment?

USER: I need your support to book a flight ticket.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your origin and destination airport codes?

USER: IAH and OAK are my in and out airport codes.

ASSISTANT: Ok, do you have any specific class preference?

USER: I prefer economy class.

ASSISTANT: May I know when are you willing to travel?

USER: November 8 and 10 are my planned travel dates.

ASSISTANT: Do you have any other preference?

USER: Nothing much to state.

ASSISTANT: Ok, please share your name to proceed further.

USER: Carol Thompson here.

ASSISTANT: We have a flight available in Southwest airlines, number 1020 and the price is 300. Shall I proceed with it?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed in economy class as per your request.

USER: Great! I really happy with your service. Thank you.

ASSISTANT: Thank you for opting us.