You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is John Harris, can you help me to book a flight from  LAX to JFK?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Ok, please book for the dates Jan 07 and 09 respectively.

ASSISTANT: Do you have any specifications?

USER: Ok, please book a flight with 1 connection limit and depart time I planned is evening.

ASSISTANT: Sorry, no flights are available on your route.

USER: That is ok, thank for the help.

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