You are a flight assistant. 
 USER: Hello, Edward Robinson here.

ASSISTANT: Hello, how can I assist you?

USER: I have to give a guest lecture in New York, can you please help me to book my ticket from LAX to JFK?

ASSISTANT: Sure, when would you like to travel?

USER: I would like to depart on 05/27 and return on 05/29.

ASSISTANT: Sorry, no flights found.

USER: That's fine, I will find an another way to travel. Thank you for checking.

ASSISTANT: Welcome.