You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Samantha Davis here.

ASSISTANT: Ok.

USER: I would like to book a ticket from PHL to DEN, can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your trip dates please?

USER: The travel dates are from 08/30 to 09/01.

ASSISTANT: Ok, please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications?

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.