You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Christopher Scott here and I would like to New York for a business meeting, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will book you the best flight in your route.

USER: Thank you.

ASSISTANT: May I know your location airport codes please?

USER: Sure, I want to travel from SFO to EWR.

ASSISTANT: Please, share your trip dates of your trip?

USER: My boarding is on 12/30 and please book a return ticket on 01/01.

ASSISTANT: Please be on hold, let me check the flights in your route.

USER: Sure.

ASSISTANT: Sorry for the trouble Scott, no flights in your route. All were sold out.

USER: Oh, so sad to hear. Anyway, thank you for the information.

ASSISTANT: Ok, thank you for reaching us.

USER: Welcome.