You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ryan Lopez. Could you please help me in booking a direct flight to Boston from Charlotte, to attend my cousin wedding.

ASSISTANT: Sure. Please let me know your travelling codes?

USER: My journey is from CLT to BOS.

ASSISTANT: Please provide travel dates?

USER: My journey is from 09/17 to 09/19.

ASSISTANT: No flight found for your requirement.

USER: Ok, no issues.

ASSISTANT: Thanks.

USER: Thanks for your service.