You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Edward Nelson and I want to book the flight ticket from PHX to DCA. Can you please help me?

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

USER: My travel dates are Apr 17 and Apr 19.

ASSISTANT: May I know your class and airline preference please?

USER: I am comfortable with any class and any airlines.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a single connection.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.