You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Find a flight for me from IAD to DFW, to meet my brother to celebrate his birthday.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Ok, my travel dates are from Jan 31 to Feb 02.

ASSISTANT: May I know your name please?

USER: Sure, I am Timothy Gonzalez.

ASSISTANT: Do you need a break in between your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your other requirements?

USER: I need a flight in business class.

ASSISTANT: Timothy Garcia, no flights has been found on your planned travel dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.