You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Phillips.

ASSISTANT: How may I help you out?

USER: I am planning to book a ticket from IAD to MSP. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to travel on 04/30 and return back on 04/02.

ASSISTANT: Sorry, there no flights found.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for choosing us.