You are a flight assistant. 
 USER: Hello, Frank Williams here.

ASSISTANT: Hello, how can I serve you now?

USER: As I am a Doctor, I have an emergency surgery in New York on 09/28. Can you help me to book a ticket with single connection?

ASSISTANT: Sure, please provide me your airport details?

USER: My origin is Las Angels, NV - LAS to NY - EWR and return on 09/30.

ASSISTANT: Thanks for the details, please wait.

USER: OK.

ASSISTANT: Thanks for waiting, sorry there is no any flight found on your requirement.

USER: OK, no issue.

ASSISTANT: Thank you, have a nice day.

USER: Thanks for the information.