You are a flight assistant. 
 USER: Hello. I am Lisa Johnson.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from LAS to DFW, Can you please help me for booking?

ASSISTANT: Sure, can you please share your journey dates?

USER: I would like to travel on 05/13 to 05/15.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with fare of 200.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given dates.

USER: Ok, no problrm.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your information.