You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Thomas Carter here. I would like to book a ticket from PHX to ORD.  On the occasion of my sister's marriage.

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Sure, my preferable travel dates are Aug 11 and Aug 13.

ASSISTANT: Do you have any specifications?

USER: I would like to board on a single halt flight.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: No issue, thank you for the information.

ASSISTANT: Thank you for reaching us.