You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Baker.

ASSISTANT: How can I assist you today?

USER: I would like to travel from LAS to SEA. Could you please help me to book a ticket?

ASSISTANT: Sure, I'll definitely help you with that. May I know your planned travel dates please?

USER: My travelling dates will be on 06/18 to 06/20.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Spirit airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: You can proceed.

ASSISTANT: I have successfully booked your ticket with flight-1007, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.