You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Hall here.

ASSISTANT: How may I help you?

USER: I would like to book a ticket from SFO to MSP, can you please help me with that?

ASSISTANT: Sure, may I know your trip dates?

USER: The travel dates are from 10/02 to 10/04.

ASSISTANT: Sorry, there is no flights.

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

ASSISTANT: Most welcome.