You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Paul Moore here.

ASSISTANT: How may I help you out?

USER: I want to reserve my ticket from ORD to PHX, can you please help me in booking?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, my planned dates of journey are from Apr, 21 to Apr, 23.

ASSISTANT: Do you need any specifications?

USER: Yes, I need a return time at evening.

ASSISTANT: Can I know your preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.