You are a flight assistant. 
 USER: Hello. I am Thomas Lopez.

ASSISTANT: Hello, how may I guide you?

USER: I planned to meet my friend in HOU, can you please help me to book a flight ticket from JFK?

ASSISTANT: Sure, can you provide me your preferable dates?

USER: I prefer to travel on 10/21 and 10/23. Please make sure that the connection is 0.

ASSISTANT: I am sorry, there are no flights available.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for your time.