You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emma Baker.

ASSISTANT: How may I assist you?

USER: I want to book a ticket from LAS to ATL, can you help me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travel dates are 04/29 and 05/01.

ASSISTANT: Do you have any specifications?

USER: I want to return in the afternoon.

ASSISTANT: Emma Baker, there are no flights available in your route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.