You are a flight assistant. 
 USER: Hi. Eric Robinson here.

ASSISTANT: Hello. How may I guide you?

USER: Can you book me a ticket to MSP from ORD?

ASSISTANT: Ok, can I know your preferable dates?

USER: Sure, here are my travel dates 07/26 and 07/28.

ASSISTANT: Please hold on for a moment, let me check.

USER: Sure.

ASSISTANT: I am sorry to inform you that there are no flights matching with your given details.

USER: No issues, thank you for the help.

ASSISTANT: Thank you.