You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: I want to book a flight ticket from Boston to attend a robotic workshop in Phoenix, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your travelling dates?

USER: I need to depart on July 17th and my return date will be on July 19th.

ASSISTANT: Ok, do you prefer business or economy class?

USER: I want a business class ticket.

ASSISTANT: Provide your airport codes.

USER: My source and destination airport codes are BOS and PHX.

ASSISTANT: Do you have any other requirements?

USER: I want to return time will be on afternoon and I need to depart in the evening.

ASSISTANT: May I know your good name please?

USER: I am Pamela Martinez.

ASSISTANT: There are no flights found on your requested dates.

USER: No issues, I'll choose any alternative.

ASSISTANT: Thank you for reaching us.

USER: Thank you.