You are a flight assistant. 
 USER: Hello. I am Kimberly Harris.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to visit Houston underground tunnel tour in IAH. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your source code?

USER: My source is from Minneapolis & St. Paul, MSP.

ASSISTANT: Can you please share your travel dates with us?

USER: My trip dates are Oct 05 and Oct 07.

ASSISTANT: Which class do you prefer either economy or business?

USER: I would like to prefer economy class.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Ok, I will search another way to reach my destination. Anyways thank you for sharing the information.

ASSISTANT: Thank you for availing us.