You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Melissa Moore.

ASSISTANT: How may I guide you today?

USER: I would like to visit Philadelphia, please book a ticket from DCA to PHL.

ASSISTANT: May I know your journey dates?

USER: My journey dates are 11/23 and 11/25.

ASSISTANT: Wait for a while.

USER: Sure.

ASSISTANT: I found a ticket for you with price 100, flight number is 1004 and connection is 1. Is it ok for you?

USER: Ok, please book my ticket.

ASSISTANT: I confirmed your ticket successfully.

USER: Thank you for your help.

ASSISTANT: You are most welcome.