You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Davis.

ASSISTANT: How may I help you?

USER: I need a direct flight from BOS, will you please assist me in making an airline reservation to LAS?

ASSISTANT: I can help you with that, may I know your journey dates?

USER: My journey dates are Dec 1st and Dec 3rd.

ASSISTANT: May I know your preferences?

USER: The return time should be evening.

ASSISTANT: Sorry, there is no direct flight running on your route.

USER: Ok, not an issues.

ASSISTANT: Thanks for contacting us.

USER: Thank you.

ASSISTANT: You are welcome.