You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Jerry Mitchell here. I would like to travel from DEN to meet my friend who was staying in MSP, can you help me to find a flight?

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

USER: My travelling dates are 01/18 and 01/20.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's fine, thanks for your help.

ASSISTANT: Thank you for choosing us.