You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking the flight ticket from CLT to SFO?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My preferable journey dates are July 21 and July 23.

ASSISTANT: Is there any connection limit?

USER: I prefer connecting flight for this trip.

ASSISTANT: In which class would you prefer to travel?

USER: I am ok with any class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: To proceed further, can I know your name?

USER: My name is John Davis.

ASSISTANT: Thank you for providing your details, please wait for a moment.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

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

ASSISTANT: Thank you for approaching us.