You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Timothy Parker.

ASSISTANT: Nice to meet you Timothy.

USER: I am planning to travel from PHL to ATL, help me in booking a flight?

ASSISTANT: Sure, tell me your travel dates please?

USER: My travelling dates are 12/28 to 12/30.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: That's ok, thank you.

ASSISTANT: Thank you.