You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Christine Martin here. Can you please help me in booking my flight from CLT to reach ORD?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my planned trip dates are May 13th and 15th.

ASSISTANT: May I know your depart and arrival timings?

USER: I want to return in the evening.

ASSISTANT: Ok, please wait.

USER: I need a single connecting flight. Ok, sure.

ASSISTANT: Sorry, no flights found on your required dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.