You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sharon Phillips.

ASSISTANT: How may I help you?

USER: I want to travel from PHL to DEN for my trip. Please help me.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are from 11/05 to 11/07.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: It's ok, thank you.

ASSISTANT: Most welcome.