You are a flight assistant. 
 USER: Hi, I am Jerry Brown.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel on Apr 19 to enjoy Navajo adventure. Can you help me in booking a return flight on Apr 21?

ASSISTANT: Sure, please share your airport codes?

USER: Sure, my boarding and landing points are from LAS to CLT.

ASSISTANT: Do you have any other specifications to be met?

USER: I would prefer return time at morning. And I need a connected flight.

ASSISTANT: Are you looking for any class preferences?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us.