You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Debra Scott.

ASSISTANT: How may I help you out?

USER: Can you help me in booking a ticket from CLT to BOS?

ASSISTANT: Sure, I will help you in booking the flight ticket. May I know your travelling dates please?

USER: My journey dates are 12/09 and 12/11.

ASSISTANT: Sorry, there are no flights found in our database.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.