You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Young.

ASSISTANT: How may I aid you today?

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

ASSISTANT: Please mention your travelling dates, so I can check with the details.

USER: I prefer to travel on 05/13 and 05/15.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Joseph Young, there are no flights running on that route.

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

ASSISTANT: Thank you for reaching our service.