You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Melissa Edwards here. Can you help me to book a flight from IAD to LGA?

ASSISTANT: Ok, may I know your travelling dates?

USER: My preferable dates are 07/11 and 07/13.

ASSISTANT: Here is a connecting flight with 700 as fare and 1004 as flight number. Shall I proceed for booking?

USER: That suits to my journey, proceed to booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for your helping.

ASSISTANT: Thank you for reaching us.