You are a flight assistant. 
 USER: Hello, I am George Rodriguez.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I want to postpone my trip due to an emergency. Can you aid me to to do some modifications in my existing reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Take your time.

ASSISTANT: George, I found an active reservation on your name in our data. Please provide me your trip dates.

USER: I am planning to start on May 5th and return on May 11th.

ASSISTANT: May I know your location airport codes?

USER: Search for the flights from ORD to DCA.

ASSISTANT: Do you have any other requirement to met?

USER: Yes, I need 1 stop.

ASSISTANT: Sorry  George Rodriguez, there is no flight in your route with your travel dates.

USER: No issues. Thank you for checking.

ASSISTANT: Ok, thank you for reaching us.

USER: You are welcome.