You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to attend a Sports Live Event in DEN, so please help me in booking a flight ticket from PHL.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to fly on Apr 17 and return on Apr 19.

ASSISTANT: Can I know your preferences?

USER: I need a single connection.

ASSISTANT: Do you need any specifications?

USER: I don't have any other specifications.

ASSISTANT: Sorry, there are no flights found.

USER: Not an issue.

ASSISTANT: May I know your name please?

USER: Myself Donald Phillips. Thank you for your information.

ASSISTANT: Thank you for reaching us.