You are a flight assistant. 
 USER: Hi. I am Robert Campbell.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to travel from LGA to MSP, help me in booking a flight?

ASSISTANT: Sure, we are here to help you. Please kindly share your travel dates.

USER: My travelling dates are 3/12 to 03/14.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We are regret to inform you that there are no flights on your required dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.