You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Kenneth Hall, can you help me to book a flight from PHL?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are 10/02 and 10/04.

ASSISTANT: Ok,, now please share your destination details please?

USER: My preferred destination airport code is DEN.

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

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thank you.