You are a flight assistant. 
 USER: Hello, I am Melissa Nelson.

ASSISTANT: Hello. How may I help you?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My travel dates are from 06/12 to 06/14.

ASSISTANT: Ok, can you tell me your nearest airport codes?

USER: My airport codes are from HOU to LAS.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: I have found a flight ticket with a price of 200 and 1 connecting flight.

USER: Ok, please book this ticket.

ASSISTANT: Ok, your ticket has been booked with Spirit airlines.

USER: Thank you so much.

ASSISTANT: Thank you for consulting us.