You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I want to reserve my ticket from Houston, my preferable airport codes are from IAH to MSP. Can you help me?

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

USER: My planned journey dates are 03/23 and 03/25.

ASSISTANT: Please mention me your name to proceed further.

USER: Myself Dorothy Baker.

ASSISTANT: Sorry Baker, there is no flight in your route.

USER: That's ok, no problem.

ASSISTANT: Ok, thank you for reaching us.