You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am planning to book a ticket from PHX to ORD. Can you please help me out?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: I am planning to travel on July 13 and return back on July 15.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name to book the flight ticket?

USER: Sure, I am Emily Thomas.

ASSISTANT: Is there any other specifications do you have?

USER: No.

ASSISTANT: Please be on hold to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested dates of travelling.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for approaching us, have a great day.