You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan Walker here.

ASSISTANT: How can I aid you at this moment?

USER: I want to attend my neighbour's wedding at Chicago, so please book my ticket from New York.

ASSISTANT: Sure, I will help you with this. Can you please provide your nearest airport codes of journey?

USER: I will depart from LGA and reach ORD.

ASSISTANT: May I know your preferable journey dates please?

USER: My itinerary dates are 04/10 and 04/12.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Ryan Walker, there are no flight services available on this route on your provided dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for consulting us.