You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Could you please help me to book a flight ticket from TX to attend a client meeting?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: I need to depart on Jan 3rd and my return date will be on Jan 5th.

ASSISTANT: May I know your preferable airport code names for further process?

USER: My boarding airport code is HOU and my landing airport code is IAH.

ASSISTANT: May I know your name for further process?

USER: I am Laura Turner.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: In which class do you want to travel?

USER: I prefer to fly with the business class ticket.

ASSISTANT: Do you have any another specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's fine, I'll choose any alternative. Thank you.

ASSISTANT: Thank you for reaching us.