You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me in making an airline reservation from DEN to PHL?

ASSISTANT: Ok, I am happy to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are May 7th and May 9th.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your good name?

USER: Barbara Edwards.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.