You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, can you mention your trip dates?

USER: I will start on 12/08 and return on 12/10.

ASSISTANT: Do you need any connections?

USER: I need a direct flight.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Deborah Hill.

ASSISTANT: Sorry, there is no flight found with your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.