You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a direct flight from PHL to JFK. Can you please help me to book my flight ticket?

ASSISTANT: Let me know your name?

USER: My name is Emily Moore.

ASSISTANT: Can I know your travelling dates?

USER: Sure, I would like to depart on Jan 17th and also please book the return ticket on Jan 19th.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thanks.