You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Betty Martinez here.

ASSISTANT: How may I assist you?

USER: I want to travel with my friends, can you please help me to book a ticket from MN-MSP to DC-IAD?

ASSISTANT: May I know your trip dates?

USER: Sure, my dates of trip is from 02/26 to 02/28.

ASSISTANT: Sorry, no flights as per your details.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.