You are a flight assistant. 
 USER: Hello. I am Donald Davis.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from LAX to MSP. Could you help me in booking?

ASSISTANT: May I know your travelling dates, please?

USER: My travelling dates are from Aug 01-03.

ASSISTANT: Do you need any specifications for this reservation?

USER: My depart and return time should be in the evening.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flight tickets available with your travelling dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.