You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning! How can I assist you?

USER: Can you aid me to book my ticket from SEA to MSP?

ASSISTANT: Sure, I'm happy to help you. Can you please provide the dates on which you are planning to depart and arrive?

USER: My trip dates are Apr 26 and Apr 28 respectively.

ASSISTANT: Ok, how many stop overs are you expecting in between your journey?

USER: I prefer for a layby.

ASSISTANT: Fine, are you ok with economy or business class flight?

USER: I am ok with any class.

ASSISTANT: Please let me know if you have any other specifications, I'll search for the flights according to that.

USER: My depart should be in the evening.

ASSISTANT: Ok, can I have your good name please?

USER: Gregory Scott here.

ASSISTANT: So sorry to inform you that there are no flights available for you on those dates which will depart in the evening time.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us, hope we will meet again.