You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Jackson here.

ASSISTANT: How can I assist you?

USER: I want to attend rock music concert. Can you check the flight availability from PHX to DCA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My planned travelling dates are 08/24 and 08/26.

ASSISTANT: May I know in which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any time concerns?

USER: Make sure that, my return time should be in evening.

ASSISTANT: Do you have any other specifications?

USER: I want a flight with maximum connection of 1.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.