You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth Scott.

ASSISTANT: Scott, how may I assist you at this moment?

USER: I am planning to travel from IAD to LAX. My date of travelling is on 03/18 to 03/20.

ASSISTANT: Ok, wait for a moment please. Scott, sorry for the inconvenience no flights as per your details. Thank you for reaching us.