You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Jason Thomas. Can you please help me in booking a flight ticket from PHL to JFK?

ASSISTANT: Sure, I am glad to help you in booking process. Will you please share your travel dates?

USER: I want to fly on June 13 and return on June 15.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on you particular travel dates.

USER: Not an issue. Thank you.

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