You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Can you please book flight on my name George Moore?

ASSISTANT: Sure, Could you please provide your travelling dates?

USER: 05/13 to 05/15 are the travel dates.

ASSISTANT: Please provide your airport codes?

USER: New York, JFK is the initial point. Philadelphia, PHL is the destination to attend the science seminar.

ASSISTANT: Thanks for sharing your details.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights available with your given details.

USER: Ok. Thank you.

ASSISTANT: Thank you for contacting us. Have a nice day.