You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Dennis Wilson.

ASSISTANT: How may I helpful to you?

USER: I want to attend a Flower festival at San Francisco, CA-SFO, can you please book me a ticket from Washington, DC-DCA?

ASSISTANT: Sure, let me know your price limit?

USER: My price limit is 1000.

ASSISTANT: Kindly provide your dates of travel?

USER: My dates of travel are from 04/20 to 04/22.

ASSISTANT: I found a flight from Frontier airline with flight number 1020 of fare 100. Shall I confirm your booking with one connection?

USER: Yes, please confirm.

ASSISTANT: Your flight reservation is done.

USER: Thank you.

ASSISTANT: Thanks for opting us.