You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Emma Smith. I am planning to travel from ATL to PHL, can you help in booking a flight?

ASSISTANT: Sure Emma Smith, I am here to help you with that flight ticket booking. Can you please share me your travel dates?

USER: My travelling dates are 12/23 to 12/25.

ASSISTANT: Thank you for waiting. I am very sorry to say that, there are no flights available as per your given travel dates.

USER: That's ok, thank you.

ASSISTANT: You are welcome, thank you for contacting us.