You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Charles Roberts.

ASSISTANT: How can I assist you?

USER: I would like to travel to visit Minneapolis with my friends, can you help me for that?

ASSISTANT: Sure, I will help you. Can you please tell me your trip dates?

USER: My travelling dates are from 10/11 to 10/13.

ASSISTANT: Kindly share your airport codes?

USER: My travelling airport codes are from IAH to MSP.

ASSISTANT: Sorry, no flights are available for you on your planning dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a safe flight.