You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Young.

ASSISTANT: Helen Young, how may I aid you?

USER: I want to book a ticket from CLT to LGA, can you help me?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are on Oct 09 and Oct 11.

ASSISTANT: Do you have any specifications?

USER: I need to depart by evening.

ASSISTANT: Sorry, no flights are available on your planned dates.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.