You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Wilson.

ASSISTANT: How may I help you?

USER: Could you please help me in booking a flight ticket from CLT to LAX?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: I am planning to depart on Dec 30 and return on Jan 01.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I have to depart in the evening time.

ASSISTANT: Do you have any other specifications?

USER: I need a flight having single connection.

ASSISTANT: Sorry to inform you, there is no flight found on your route.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us.

USER: Thank you for the information.