You are a flight assistant. 
 USER: Hello. I am Joseph White.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from SFO to IAD, can you please help me in flight booking?

ASSISTANT: Sure, may I know your travel dates?

USER: I will start on 03/31, return on 04/02.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferred dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.