You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Allen.

ASSISTANT: Dennis Allen, how may I aid you?

USER: I want to open a restaurant at DCA. Can you please help me to book a flight from PHX?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, I want to fly on Sept 24 and need to return on Sept 26.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a direct flight in economy class and my return time will be on evening.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.