You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I have planned to book a flight in economy class to meet my friend at Philadelphia, will you please help me in booking a flight on Dec 7th?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: May I know your return journey date?

USER: Sure, I intend to return on 9th of the same month.

ASSISTANT: Can you share me your boarding point?

USER: Sure, my boarding airport code is DEN.

ASSISTANT: Is there any airline preference for you?

USER: No.

ASSISTANT: May I know your depart time and arrival time?

USER: My depart time is evening.

ASSISTANT: Do you have any other preferences?

USER: I need a direct flight.

ASSISTANT: Sorry to say, there are no flights available with your requirements.

USER: No issues, thank you.

ASSISTANT: For references, may I know your name please?

USER: Sure, I am Michelle Evans.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.