You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Karen Martin and I want to book the flight ticket from PHL to CLT. Can you please help me?

ASSISTANT: Sure, may I know your journey dates?

USER: My travel dates are 07/09 and 07/11.

ASSISTANT: Do you require any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your departure and return timings?

USER: I would like to return in the morning.

ASSISTANT: Sure, Is there any other specifications?

USER: No.

ASSISTANT: Please wait for a while.

USER: Take your time.

ASSISTANT: We regret to inform that, there are no flights running with your requirements.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.