You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Elizabeth Miller here.

ASSISTANT: How may I assist you?

USER: Please assist me by booking a flight ticket to SEA.

ASSISTANT: Sure, may I know your source airport code please?

USER: My source airport code is BOS.

ASSISTANT: May I know your travelling dates please?

USER: My trip dates are 11/01 and 11/03.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in Frontier airlines with price 100. Shall I proceed?

USER: Yes, you can book it.

ASSISTANT: Ok, your ticket has been booked with flight number 1020.

USER: Thank you.

ASSISTANT: Thank you for choosing us.