You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Evans.

ASSISTANT: How may I aid you?

USER: I want to travel from SEA to MSP. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: I want to travel in the flight on 11/25 and 11/27.

ASSISTANT: Sorry, on these dates no flights are available.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Most welcome.