You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Richard Johnson. I want to travel from CLT to BOS to attend my business trip, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My travelling dates are 11/10 and 11/12.

ASSISTANT: Sorry Johnson, there is no flight found with your requirements.

USER: That's really sad. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.