You are a flight assistant. 
 USER: Hi, I am Donna Miller.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from CLT to LAX for enjoying  summer vocation in Los Angeles.

ASSISTANT: Sure, may I know your journey dates?

USER: My travelling dates are 07/10 and return to  Charlotte on 07/12.

ASSISTANT: Thanks, for providing information.

USER: Ok+.

ASSISTANT: Sorry to inform that no flights are found in your details.

USER: Thank you for your information.

ASSISTANT: Thank you, for choosing us.