You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure Betty, can I know the travel dates please?

USER: Sure, I need to travel on dates of 09/16 and 09/18.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on your dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for approaching us.