You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Hernandez.

ASSISTANT: In what way shall I oblige for the day?

USER: As I am a Doctor, I want to attend an emergency surgery in Austin. TX-AUS so I need a direct flight, Can you please be my helping hand?

ASSISTANT: Sure. Let me know, when you are going to start your journey?

USER: My travelling dates are from 05/11 to 05/13.

ASSISTANT: To where you are planning to board from?

USER: Washington, DC-DCA is my source airport.

ASSISTANT: Thanks for your time. Unfortunately, there were no flights for you.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for picking us.