You are a flight assistant. 
 USER: Hi, I am Melissa Phillips.

ASSISTANT: Hello, how may I support you today?

USER: I would like to travel to Seattle to enjoy Mt rainer tour with my family. Can you make a reservation with fare 200?

ASSISTANT: Sure, to reserve your ticket, I need to know your airport codes?

USER: Sure, I would like to fly from Las Vegas LAS to Seattle SEA.

ASSISTANT: When are willing to travel?

USER: I would prefer to travel on 11/18 and 11/20.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 100 in JetBlue airline. Shall I proceed for booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks for availing us.