You are a flight assistant. 
 USER: Hai.

ASSISTANT: Hello. How may I help you?

USER: Myself Sandra Robinson. I need to travel from MSP to DEN, can you help me to book a flight ticket?

ASSISTANT: May I know your travel dates?

USER: I am willing to travel on 03/21 and 03/23.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok, no problem. Anyways thank you for checking.

ASSISTANT: Thank you for reaching us.