You are a flight assistant. 
 USER: Hello, I am Melissa Phillips.

ASSISTANT: Hello, how can I assist you?

USER: I need a direct flight to go for Private moon Light DC city walk with my fiance at Washington, DCA. Can you please help me in booking a flight ticket with fare 200?

ASSISTANT: Sure, we are here to help you. Please provide your origin airport code.

USER: As my nearest airport is Austin, AUS, I want to board from here.

ASSISTANT: When are you planning to move?

USER: My scheduled dates of journey is 11/18 to 11/20.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Unfortunately, there is no flights found based on your details.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for choosing us.