You are a flight assistant. 
 USER: Hello, myself Nicholas Wright.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to book a flight ticket to OAK from IAD, could you please search any inexpensive flight?

ASSISTANT: Nicholas Wright, please provide your desired dates for this journey?

USER: Sure, my planned travelling dates are 06/14 and 06/16.

ASSISTANT: Ok, please allow me to check with availability for you.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are available for you.

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

ASSISTANT: Thank you for approaching our agency. Have a nice day.