You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to travel from PHX to ORD, can you please help me in flight booking?

ASSISTANT: Sure, please share me your trip dates.

USER: I will start on Apr 17, return on Apr 19.

ASSISTANT: Do you need any specifications?

USER: My depart time should be morning, return time should be afternoon.

ASSISTANT: May I know your class preferences?

USER: I want a economy class flight ticket.

ASSISTANT: Is there any connection limit for you?

USER: I want a single connecting flight.

ASSISTANT: For booking, we need your good name. Please provide it.

USER: My name is Anthony Harris.

ASSISTANT:  Sorry to say that, there are no flights available on the routes of your journey.

USER: Not an issue, thank you.

ASSISTANT: Thank you for communicating with us.