You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Larry Gonzalez, could you help me to reserve a ticket from MSP to ORD?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are on 07/18 and 07/20.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Larry, there is no flight with your travel dates in your route.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.