You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help in booking a flight ticket from IAH to OAK?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: Sure, my travel dates are from June 14 to June 16.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need to fly in connecting flight.

ASSISTANT: Are you comfortable with economy class flight or business class flight?

USER: I would prefer business class for my journey.

ASSISTANT: Do you have any specific time preference for your return journey and depart journey?

USER: No.

ASSISTANT: May I know your preferred airline for your journey to fly?

USER: I am comfortable to travel in any airlines.

ASSISTANT: Please help me with your name to proceed further to book a flight ticket?

USER: Myself Ronald Garcia.

ASSISTANT: Please bear with me for 2-3 minutes while I check for the flights availability.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, Ronald Garcia. I am afraid that there is no business class flight available for the mentioned dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Your patience is appreciated, Ronald Garcia. Thank you for reaching us!.