You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mark Thomas here.

ASSISTANT: How may I help you today?

USER: I would like to prefer a direct flight for my holiday trip to Houston. Can you book it?

ASSISTANT: Sure, can you please provide me with your dates of journey?

USER: The travel dates are from 04 June to 06 June.

ASSISTANT: May I know your respective airport codes of journey please?

USER: The airport codes are from SFO to IAH.

ASSISTANT: Are you looking for any other help from my side please?

USER: No, that is it.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: There is a connecting flight of fare 200 with the AA airline, shall I proceed with this booking?

USER: You can book the flight ticket.

ASSISTANT: Ok, I have reserved your ticket with the flight number 1029.

USER: Thank you.

ASSISTANT: You are welcome, have a great day.