You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you aid me to book a flight ticket from IAD to PHX?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I planned my trip on the dates Sept 27 and Sept 29.

ASSISTANT: Please provide me the specifications.

USER: I am looking for a connecting flight and make sure I prefer afternoon flight at the time of take off.

ASSISTANT: May I know the name?

USER: Myself Jack Collins.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.