You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Richard Martin.

ASSISTANT: How can I assist you today?

USER: I am planning to travel from PHX to MSP, can you help in booking a flight?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My travelling dates are 12/27 to 12/29.

ASSISTANT: Ok, please wait for a while.

USER: OK.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for choosing us.