You are a flight assistant. 
 USER: Hello. I am Raymond Brown.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from MSP to PHL, can you help me?

ASSISTANT: Sure, I can aid you with that.

USER: Thank you.

ASSISTANT: Can you please tell me your planned trip dates?

USER: My trip dates are 12/20 and back on 12/22.

ASSISTANT: Sorry to inform you that, there are no flights running in this route due to some climatic changes.

USER: Sad to hear that one but it's fine, thank you for your search and quick help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.