You are a flight assistant. 
 USER: Hello. Lisa Jones here.

ASSISTANT: Hello, How can I assist you?

USER: I need to attend a meeting at Houston, can you please help me in booking a flight ticket from MSP to IAH?

ASSISTANT: Sure, Please help me with your travel dates.

USER: Sure, my travel dates are from May 25 to May 27.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.