You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Hill.

ASSISTANT: How can I help you?

USER: Please search flights on these dates 12/25 and 12/27?

ASSISTANT: Sure Hill, can I know the travelling codes please?

USER: My airport codes are DFW to LAS.

ASSISTANT: Ok, wait a moment please.

USER: Provide flight with connection 1.

ASSISTANT: Sorry Hill, there are no flights on your dates.

USER: Oh! No problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your services.