You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Last week that I have promised my wife to take her for Private moon light Las Vegas city walk.So I need your help to make airline reservation. Can you help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Dates are 10/07 and 10/09.

ASSISTANT: Can I know your Journey codes?

USER: My journey codes are DFW-LAS.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: May I know your name?

USER: Nicole Collins here.

ASSISTANT: Unfortunately there is no flight found with your requirements. Thank you for reaching us.

USER: No problem, Thank you.