You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight to reach Houston, can you check there is any seat available in business class?

ASSISTANT: Sure, can you share your trip dates?

USER: I will travel on Apr 11 and return on Apr 13.

ASSISTANT: May I know your airport codes?

USER: My source point is MSP and my destination is IAH.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Jacob Thomas.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.