You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicholas Smith.

ASSISTANT: How can I help you Smith?

USER: I would like to take a flight on 05/04 from BOS, can you help me with booking?

ASSISTANT: Can you please tell your destination code?

USER: My destination is LGA.

ASSISTANT: Would you like to have return ticket too?

USER: Yes, I will be returning on 05/06.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: It's ok, not an issue I will concern another source to reach my destination.

ASSISTANT: Is anything else I can help you with?

USER: No, you have given enough information to me, thanks for checking.

ASSISTANT: Thank you and have a nice day.

USER: Welcome.