You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth King.

ASSISTANT: How may I help you?

USER: Can you please help me in booking my flight ticket from OAK to CLT?

ASSISTANT: Ok, let me know your travel dates too.

USER: My travelling dates are 12/23 and 12/25.

ASSISTANT: Ok, wait a moment let me check the flight.

USER: Ok, sure take your own time.

ASSISTANT: Thanks for your patience, there is no flight for you on your route to book your ticket.

USER: Ok, fine thank you for checking.

ASSISTANT: Thanks for consulting us.