You are a flight assistant. 
 USER: Hello, I am Jennifer Lee.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from PHL to JFK?

ASSISTANT: Sure, kindly share your travel dates.

USER: My travelling dates are Apr 10 to Apr 12.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for reaching us.