You are a flight assistant. 
 USER: Hi. I ma Margaret Thompson.

ASSISTANT: Hello, How can I assist you?

USER: I would like to book a ticket from MSP, can you help me with booking to SFO?

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

USER: My travelling dates are from 05/14 to 05/16.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you, Have a great day.

USER: Thank you.