You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you at present?

USER: I am Donald Rodriguez. Can you please reserve a return ticket on 05/22?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know from where you would like to return?

USER: I will start in return from Washington, DCA.

ASSISTANT: Ok, where do you want to go from DCA?

USER: San Francisco, SFO.

ASSISTANT: Ok, please help me with other date?

USER: I will start on 05/20.

ASSISTANT: Spirit airline is running 1017 flight on your route with least fare of 100.

USER: Ok.

ASSISTANT: If you are ok with this, I will book this flight?

USER: I am comfortable to travel, please proceed to book.

ASSISTANT: Ok, your booking has been confirmed successfully.

USER: Thank you.

ASSISTANT: Thanks for choosing Spirit airlines, wish you a safe journey.