You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Samantha Adams.

ASSISTANT: How may I help you? Sure, please tell your travel dates.

USER: I am looking for a direct flight from OAK to IAD, could you help me out? My preferable dates are from 11/24 to 11/26.

ASSISTANT: Sorry, there are no direct flights available.

USER: That's ok. Thank you, have a good day.

ASSISTANT: Thank you for reaching us.