You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I aid you today?

USER: I am Margaret King. I would like to travel for DC-IAD for my brother's  birthday.can you help me that?

ASSISTANT: Sure, I am here for your service. Can you provide your Journey dates please?

USER: Sure, my origin point is FL-MCO on 03/17 return date on 03/19.

ASSISTANT: Ok, please wait for a moment, I will check the availability and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately, there are no flights found with your preferences.

USER: Thanks for your information.

ASSISTANT: Thank you for approaching us. Have a Great day.