You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a flight ticket from PHX to ORD, can you help me with that?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 04/16 and 04/18.

ASSISTANT: Can I know your class preference?

USER: I am ok with any class.

ASSISTANT: Do you have any connection limit?

USER: I want a connecting flight.

ASSISTANT: Can I know your depart and return timing?

USER: I am comfortable with any time.

ASSISTANT: May I know your name for further process?

USER: I am Justin Roberts.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, we could not find any flight on your requested dates.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching our agency.