You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I need to book my ticket from PHL to PHX. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: My planned trip dates are May 25 and May 27.

ASSISTANT: Please share me your specifications?

USER: I need to book my ticket in business class.

ASSISTANT: Can I know your good name please?

USER: Sure, myself Sharon Wright.

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

USER: That's ok, no problem.

ASSISTANT: Thank you for supporting us.

USER: Thank you for the information.