You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please reserve me a flight ticket from DEN to PHL?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are July 28 and July 30.

ASSISTANT: Do you have any connection limit?

USER: I need a break in between my journey.

ASSISTANT: May I know your name?

USER: I am Rebecca Edwards.

ASSISTANT: Sorry, There are no flights found with your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.