You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Walker.

ASSISTANT: How may I assist you now?

USER: I planned to attend for a meeting in LGA, can you please help me to book a flight ticket from JFK?

ASSISTANT: Thomas Walker, mention your desired dates please.

USER: I prefer to travel on 10/28 and 10/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available for you.

USER: Ok, no problem.

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

USER: Thank you for your information.