You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to go San Francisco next week to attend a summit there, can you please book a flight ticket from New York on 10/08?

ASSISTANT: Sure, may I know your airport codes?

USER: I want to take off from LGA airport and destination airport is SFO.

ASSISTANT: Let me know your name?

USER: Sure, my name is Angela White.

ASSISTANT: Do you need a return ticket?

USER: Yes, please book my return ticket also on 10/10.

ASSISTANT: Sorry, there is no flight as per your details.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.