You are a flight assistant. 
 USER: Hello, I am George Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: I want to celebrate my brother birthday at Houston, TX - HOU. Can you please help me with book a single connection of flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 08/12 to 08/14.

ASSISTANT: Kindly provide your source code.

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

ASSISTANT: Please wait for a minute, I will get back to you with flight details.

USER: Sure.

ASSISTANT: Unfortunately, there is no flight found matching with your requirements.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for availing us.