You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Sharon Carter, want to travel from DEN to PHL. Can you please help me?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are from 05/11 to 05/13.

ASSISTANT: Do you have any requirement?

USER: I want to book my tickets in economy class with 1 connection.

ASSISTANT: Is there any other specification to be met?

USER: Yes, I want to return in the evening.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry Sharon Carter, there is no flight in your route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.