You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth Turner.

ASSISTANT: Please inform me, how can I assist you today?

USER: I want to book a ticket from EWR to IAD, can you help me?

ASSISTANT: Sure, when are you planning to travel?

USER: My travel dates are Mar 18 and Mar 20.

ASSISTANT: Thank you for your details, there are no flights found with given details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.