You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christine Lewis.

ASSISTANT: Lewis, how may I help you today?

USER: I want to book a ticket from MN-MSP to MA-BOS.

ASSISTANT: Can I have your preferable dates?

USER: My dates of trip are from 08/12 to 08/14.

ASSISTANT: Sorry  Christine, we could not found any flights to your region on those dates.

USER: Ok, thank you for your help.

ASSISTANT: You are most welcome.