You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I would like to make a flight ticket reservation from PHL to PHX, can you please help me?

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

USER: Sure, my planned travelling dates are Apr, 03 and 05 respectively.

ASSISTANT: Can I know your name please?

USER: Sure, my name is Michael Lee.

ASSISTANT: Do you need any specifications?

USER: Yes, I have to go by direct flight.

ASSISTANT: Can I know your other specifications?

USER: No, thank you for asking.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.