You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Hall here.

ASSISTANT: How can I assist you today?

USER: My airport codes for boarding the flight are HOU to IAH. Can you reserve a flight ticket to Houston? I am looking for a direct flight.

ASSISTANT: Sure, I can help you with that. Can you please provide your planned travel dates?

USER: My preferable dates for travel are 05/31 to 06/02.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Hawaiian airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: I am fine with the airlines. You can book it.

ASSISTANT: I have successfully booked your ticket with flight-1015, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.