You are a flight assistant. 
 USER: Hi. I am Stephen Hernandez.

ASSISTANT: Hello. How may I support you today?

USER: I want to book a flight ticket from CO-DEN to AZ-PHX. Can you help me?

ASSISTANT: Sure, we are gleeful to assist you in booking. Kindly share your connection preference.

USER: I need a connecting flight.

ASSISTANT: What price would you like to put on flight ticket?

USER: 500 is my fare.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: 03/16 and 03/18 are my travelling dates.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.