You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Catherine Collins. I want to book a flight ticket from San Francisco SFO to Phoenix PHX. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Ok, my journey dates are on July 07 and return on July 09.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Which class do you prefer either economy or business?

USER: No, I don't have any class specifications.

ASSISTANT: May I know your arrival and depart timings?

USER: Yes, I want to depart in the evening time.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.