You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Raymond Allen. Can you please help me in booking my flight ticket from OAK to IAD?

ASSISTANT: Sure, could you please share me with your dates of travel?

USER: My travelling dates are 11/25 and 11/27.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, sure.

ASSISTANT: There is a flight with the connections limit 2, are you ok with this ticket booking?

USER: Ok, I need single connection flight.

ASSISTANT: Sorry Allen, there is no flight found as per your travelling details.

USER: Ok, thank you for your help.

ASSISTANT: You are welcome always.