You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please reserve me a flight ticket from PHX to DCA?

ASSISTANT: Sure, can you provide your journey dates?

USER: Sure, my journey dates are from Sept 01 to Sept 03.

ASSISTANT: Do you have any preferences?

USER: I would prefer single connection flight for my trip. No more specifications.

ASSISTANT: May I know your name?

USER: Myself Jacob Adams.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.