You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What would I do for you?

USER: I am Nicholas Smith. I want to meet my old friend in Oakland.

ASSISTANT: Ok, may I know your nearest airport code?

USER:  Book a ticket from EWR to OAK.

ASSISTANT: May I know your dates of journey?

USER: My trip dates are from 05/04 to 05/06.

ASSISTANT: Nicholas Smith sorry to say this there is no flight for your destination. Thank you for choosing our service.

USER: That's not an issue. Thank you for the help.