You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I need you to book a flight ticket from PHX to PHL.

ASSISTANT: Sure, We are here to assist you. Can I know your travelling dates?

USER: December 10 and 12 are my planned travelling dates.

ASSISTANT: Do you need any break?

USER: Yes, I need a break in between my journey.

ASSISTANT: Is there any other specification?

USER: I prefer to fly in a flight that departs in the morning.

ASSISTANT: May I know your name?

USER: My name is Emily Nelson.

ASSISTANT: We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Oh! Is it so, that's ok. Thanks for your time.

ASSISTANT: Thank you for reaching us.