You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I am Melissa Carter, can you help me to book a flight from DCA for a round trip?

ASSISTANT: Can you please share your preferable journey dates?

USER: My travelling dates are 05/12 and 05/14.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: Proceed with booking.

ASSISTANT: I confirmed your ticket successfully.

USER: Thank you.

ASSISTANT: Thank you for contacting us.