You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you out?

USER: As I am a Doctor, I want to attend an emergency surgery in Las Vegas, NV - LAS. Can you please be my helping hand?

ASSISTANT: Ok. Sure, I will help you. Can you please tell me your travelling dates?

USER: I want to fly on 06/06 and return on 06/08.

ASSISTANT: May I know, from where you want to board?

USER: My source is from Washington, DC - DCA.

ASSISTANT: Please mention your name.

USER: I am Alexander Nelson.

ASSISTANT: Ok, thanks for sharing the details.

USER: OK.

ASSISTANT: There is Frontier airline with a connecting flight that matches your request. May I proceed to book with a flight number 1001?

USER: Please proceed.

ASSISTANT: Ok, your reservation is done.

USER: Thanks for your prompt service.

ASSISTANT: Thanks for availing us, have a cheerful day.