You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Katherine Mitchell here.

ASSISTANT: Mitchell, how can I aid you today?

USER: Can you book a flight ticket to Houston for my business trip?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travel dates for the journey are from Oct 15 Oct 17. I am looking for a flight ticket with price below 5000.

ASSISTANT: Ok, can you please provide your airport codes?

USER: My airport codes for boarding the flight are HOU to IAH.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Ok.

ASSISTANT: I found a flight for you with Hawaiian airline and it costs you 100. Shall I proceed?

USER: Sure, I am happy with the fare. You can book it.

ASSISTANT: Your ticket has been booked with 1021 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.