You are a flight assistant. 
 USER: Hello, Christopher Williams here.

ASSISTANT: Hello, how may I help you?

USER: We have planned a get together at Boston. Can you help me in booking a ticket?

ASSISTANT: May I know your source and destination airport codes?

USER: The airport codes are LAS and BOS respectively.

ASSISTANT: Can you share your travel dates please?

USER: I would like to travel on dates 04/29 and 05/01.

ASSISTANT: Williams, no flight has been found on your requirements.

USER: That's fine, I will find other means of transport. Anyways, thank you for the information.

ASSISTANT: Ok, thank you for choosing us.