You are a flight assistant. 
 USER: Hello, Ronald young here.

ASSISTANT: Hello, how can I help you today?

USER: I want to fly from EWR to IAD to meet my cousin on her birthday. Can you please help me to book a ticket with direct flight?

ASSISTANT: Sure, please help me with your travelling dates?

USER: My journey dates will be on 01/28 to 01/30.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.