You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me booking a flight ticket from PHL to IAD?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I will start on 11/15 and return on 11/17.

ASSISTANT: Do you have any preferences?

USER: I need a break in my journey.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: No problem, thank you for the information.

ASSISTANT: Can I know your name?

USER: I am Samantha Lee.

ASSISTANT: Thank you for contacting us.