You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure Barbara Roberts, I will help you with that. Can you please provide your journey dates?

USER: The travel dates are from 11/05 to 11/07.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Sorry to say that, there are no flights available in your route as per your travel dates.

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

ASSISTANT: You are welcome, thank you for reaching us. Have a great day.