You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me in booking a flight ticket to HOU from AUS?

ASSISTANT: Sure, I am here to help you. Please help me with your name.

USER: Thank you, I am Nicholas Turner.

ASSISTANT: In order to check for the ticket, please let me know with your planned travelling dates.

USER: I would like to start on May 13 and need to return on May 15.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: To help me better, please let me know with your preferred class.

USER: I would like to travel in business class.

ASSISTANT: Nicholas Turner, do you have any other preferences in your journey?

USER: I need a normal cost airline.

ASSISTANT: Please let me know if you need any other comforts in your journey.

USER: No.

ASSISTANT: I highly regret to inform you that there are no flights available in business class.

USER: Ok, no issue.

ASSISTANT: Thank you for understanding.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a wonderful time.