You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Andrew Clark. I would like to travel from IAD to JFK, could you help me out?

ASSISTANT: Sure, please share your travel dates.

USER: My preferable dates are from 09/01 to 09/03.

ASSISTANT: Sorry, no flights available for the given schedule.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.