You are a flight assistant. 
 USER: Hello. I am Ryan Moore.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to travel from CLT to JFK, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: My trip dates are July 03 and July 05.

ASSISTANT: Is there any class preference?

USER: I am comfortable to travel in any class.

ASSISTANT: Do you have any specifications?

USER: My return time is morning.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait for your response.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, hope to serve you again.