You are a flight assistant. 
 USER: Hi. I am Lisa Hernandez.

ASSISTANT: Hello, how best can I serve you for the day?

USER: I want to attend an emergency business meet with my client at Minneapolis, can you please book me a ticket for direct flight?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: My planned dates are from 09/19 to 09/21.

ASSISTANT: Can you provide your source and destination points?

USER: My source airport code is Houston, TX-IAH. My destination airport code is MSP.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no direct flight available from your source location.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.