You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: Sure, I am Richard Jones.

ASSISTANT: How may I assist you now?

USER: As I am a doctor, I want to attend an emergency case at Washington, DC - DCA. Can you please help me for booking a ticket on 02/17?

ASSISTANT: Sure, please share your return date.

USER: I want to return on 02/19.

ASSISTANT: May I know your source airport code?

USER: My source is Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for your time, we found a connecting flight with a fare of 100 in 1018 Frontier airline.

USER: Ok, please confirm.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.